This project aims to commercialize CVD-produced diamond films for use in electronics, optics, and wear-resistant coatings. It will initially produce polycrystalline diamond heat sinks and optical windows, as well as diamond-composite cutting inserts and laser processing services. Later goals include producing monocrystalline detectors, transistors, and microelectromechanical systems using thin diamond films. The project is a collaboration between the Russian Academy of Sciences and a private company. Products will be sold to electronics, optics, and tool manufacturing industries. The first stage will produce individual elements, while the second will make more complex products using CVD-diamond elements. Production methods and quality will be improved over the life of the project.
The document describes experiments to create a tapered porous structure in anodic aluminum oxide (AAO) tubular membranes for use in hemodialysis. It outlines procedures for a two-step anodization process using different electrolyte solutions and voltage parameters at each step. Analysis of results from initial experiments showed that membrane thickness increased with voltage and time during second anodization. Future work proposed repeating experiments while systematically varying time parameters to optimize pore size around 20nm and thickness near 60μm.
The document discusses microfabrication techniques for manufacturing nano-scale structures. It describes both top-down approaches that sculpt materials from larger to smaller sizes (such as photolithography, nanoimprint lithography, and nanosphere lithography) and bottom-up approaches that assemble structures from smaller building blocks (like carbon nanotube synthesis and molecular self-assembly). Common microfabrication processes discussed include lithography, thin film deposition, doping, etching, and bonding. Both isotropic and anisotropic etching techniques are covered.
The document describes the synthesis and morphology of silicon nanoparticles deposited on a silicon dioxide substrate using low pressure chemical vapor deposition with varying deposition times. Atomic force microscopy and image analysis software were used to characterize the nanoparticles and found that their height, density, and size varied with deposition time, with heights between 1-3 nm, densities from 2x1011 to 3.5x1011 particles/cm2, and sizes of 2-10 nm. The goal was to study how the morphological and electrical characteristics of the nanoparticles changed with different deposition parameters.
ZnS Nanostructures: Synthesis, Characterization, and Theory - Defense Present...Daniel Moore
Daniel Moore's Ph.D. defense presentation summarizes his research on synthesizing and characterizing novel ZnS nanostructures. He discusses various ZnS nanostructures including nanobelts, aligned nanowires, nanohelices, and ultralong core-shell ZnS-SiO2 nanowires. Various growth mechanisms are proposed including vapor-liquid-solid and vapor-solid processes. Parameters like temperature, time, and catalyst are found to influence the morphology. Characterization using TEM, XRD and photoluminescence elucidate the crystal structure and composition of the nanostructures.
This document discusses ZnO nanostructures and their applications in nano-LEDs and nano-generators. It first provides background on ZnO, including its properties and common forms. It then describes the principles and synthesis methods of flexible nano-LEDs and piezoelectric nano-generators based on ZnO nanowires. Potential applications of these ZnO nanostructure devices include lighting, self-powered nanosystems, portable electronics and alternative energy.
This document summarizes the synthesis and characterization of cadmium sulfide (CdS) nanorods doped with copper (Cu) for application in photonic devices. X-ray diffraction analysis showed that the as-prepared CdS:Cu nanorods were a mixture of hexagonal and cubic phases, with preferential growth of the (100) plane. Transmission electron microscopy images revealed garland-like nanorod structures consisting of cubic and hexagonal particles, with hexagonal particles confirming the hexagonal phase of CdS. The CdS:Cu nanorods exhibited a red shift in absorption compared to undoped CdS, indicating quantum confinement effects due to Cu doping.
The document describes experiments to create a tapered porous structure in anodic aluminum oxide (AAO) tubular membranes for use in hemodialysis. It outlines procedures for a two-step anodization process using different electrolyte solutions and voltage parameters at each step. Analysis of results from initial experiments showed that membrane thickness increased with voltage and time during second anodization. Future work proposed repeating experiments while systematically varying time parameters to optimize pore size around 20nm and thickness near 60μm.
The document discusses microfabrication techniques for manufacturing nano-scale structures. It describes both top-down approaches that sculpt materials from larger to smaller sizes (such as photolithography, nanoimprint lithography, and nanosphere lithography) and bottom-up approaches that assemble structures from smaller building blocks (like carbon nanotube synthesis and molecular self-assembly). Common microfabrication processes discussed include lithography, thin film deposition, doping, etching, and bonding. Both isotropic and anisotropic etching techniques are covered.
The document describes the synthesis and morphology of silicon nanoparticles deposited on a silicon dioxide substrate using low pressure chemical vapor deposition with varying deposition times. Atomic force microscopy and image analysis software were used to characterize the nanoparticles and found that their height, density, and size varied with deposition time, with heights between 1-3 nm, densities from 2x1011 to 3.5x1011 particles/cm2, and sizes of 2-10 nm. The goal was to study how the morphological and electrical characteristics of the nanoparticles changed with different deposition parameters.
ZnS Nanostructures: Synthesis, Characterization, and Theory - Defense Present...Daniel Moore
Daniel Moore's Ph.D. defense presentation summarizes his research on synthesizing and characterizing novel ZnS nanostructures. He discusses various ZnS nanostructures including nanobelts, aligned nanowires, nanohelices, and ultralong core-shell ZnS-SiO2 nanowires. Various growth mechanisms are proposed including vapor-liquid-solid and vapor-solid processes. Parameters like temperature, time, and catalyst are found to influence the morphology. Characterization using TEM, XRD and photoluminescence elucidate the crystal structure and composition of the nanostructures.
This document discusses ZnO nanostructures and their applications in nano-LEDs and nano-generators. It first provides background on ZnO, including its properties and common forms. It then describes the principles and synthesis methods of flexible nano-LEDs and piezoelectric nano-generators based on ZnO nanowires. Potential applications of these ZnO nanostructure devices include lighting, self-powered nanosystems, portable electronics and alternative energy.
This document summarizes the synthesis and characterization of cadmium sulfide (CdS) nanorods doped with copper (Cu) for application in photonic devices. X-ray diffraction analysis showed that the as-prepared CdS:Cu nanorods were a mixture of hexagonal and cubic phases, with preferential growth of the (100) plane. Transmission electron microscopy images revealed garland-like nanorod structures consisting of cubic and hexagonal particles, with hexagonal particles confirming the hexagonal phase of CdS. The CdS:Cu nanorods exhibited a red shift in absorption compared to undoped CdS, indicating quantum confinement effects due to Cu doping.
The document summarizes different methods for synthesizing cadmium sulfide (CdS) nanoparticles. It describes an aqueous precipitation method using cadmium nitrate and sodium sulfide precursors that produces yellow CdS precipitate. It also outlines a sol-gel method using cadmium acetate, diaminobenzene, and thioacetamide precursors that generates a CdS sol and gel. Additionally, it mentions a hydrothermal method using cadmium nitrate, thiourea, and hexamethylenetetramine precursors under high temperature and pressure that can control CdS morphology. The document provides an overview of various preparation techniques for CdS nanoparticles.
Synthesis, Characterization of ZnS nanoparticles by Coprecipitation method us...IOSR Journals
ZnS nanoparticles are prepared by coprecipitation method using various capping agents like PVP (polyvinylpyrrolidone), PVA (polyvinylalcohol) and PEG-4000 (polyethyleneglycol). These are characterized by UV-Visible spectra, X-ray diffraction (XRD) studies, Fourier Transform Infra-red spectra (FTIR) and Transmission electron microscopy (TEM). UV-Visible absorption spectra are used to find the optical band gap and the values obtained have been found to be in the range of 3.80-4.00eV. The particle size of nanoparticles calculated from XRD pattern has been in the range of 2-4 nm. It is also observed that the particle size of nanoparticle is affected by the nature of capping agent. Photo catalytic degradation of xylenol orange (XO) by the nanoparticles shows that these act as photo catalysts under sunlight irradiation. The XO dye was degraded more than 87.24, 83.42 and 73.05% in the presence of PEG-4000, PVA and PVP capped ZnS nanoparticles in 120, 150 and 180 min. respectively. The kinetics of catalyzed by synthesized ZnS nanoparticles with XO dye follows pseudo-first order kinetics with reasonable apparent rate constants.
This master's thesis investigates methods for producing mesoporous titania microspheres with high surface area for use in dye-sensitized solar cells (DSSCs). The sol-gel method is employed using supramolecular self-assembly templating with folic acid to generate titania. Additional methods using acetylacetone and atrane are explored to decrease the hydrolysis rate and achieve smaller pore sizes. Formation of titania microspheres through spray-drying is also investigated to increase surface area. Characterization shows the materials have low crystallinity and surface areas below the goals for DSSC application due to constraints requiring pH > 7. The conclusion is acidic conditions are essential for anatase crystallization, and decreasing
Kristy Wendt has extensive experience characterizing materials using various microscopy techniques. She has worked with clients from Washington University to analyze samples ranging from nanoparticles to biological tissues. Wendt enjoys developing new processing protocols to image challenging samples. She also trains others and collaborates across facilities to further characterization capabilities.
This document summarizes research on the effect of different organic solvents and annealing temperatures on the optical properties of TiO2 nanoparticles. Specifically, it finds that using benzyl alcohol as the solvent instead of ethanol results in larger particle sizes of 40-60 nm compared to 20-30 nm. This is because benzyl alcohol has a higher boiling point, allowing more time for nucleation and growth. The larger particles have a lower band gap, absorbing visible light up to 400 nm instead of 350 nm. Overall, the solvent's boiling point influences particle size, which then affects the optical properties of the TiO2 nanoparticles.
Quantum dots for optoelectronic devices - phdassistancePhD Assistance
Nanometre-scale semiconductor chips have been imagined as next-generation technology with high functionality and convergence. Quantum dots, also known as artificial atoms, have special properties owing to their quantum confinement in all three dimensions. Quantum dots have a lot of interest in optoelectronic systems because of their special properties.
For decades, self-assembled nanostructures have been a topic of considerable concern and significance.
Learn More:https://bit.ly/3xJJAiZ
Contact Us:
Website: https://www.phdassistance.com/
UK: +44 7537144372
India No:+91-9176966446
Email: info@phdassistance.com
The manufacturing of microprocessors involves growing pure silicon crystals, slicing wafers, and fabricating integrated circuits through repeated photolithography, etching, deposition, and doping steps in a clean room environment. Key steps include slicing silicon ingots into wafers, layering and patterning materials like insulators and conductors through photolithography and etching, and implanting dopants using ion implantation. After fabrication, the wafers are tested, cut into chips, and packaged into protective casings before use in electronic devices.
Low Temperature Synthesis of ZnO Nanoparticlescurtistaylor80
This document summarizes a new low-temperature vapor phase transport process for synthesizing ZnO nanoparticles. ZnO powder and carbon are used as precursors and decomposed at temperatures as low as 225°C to form ZnO nanoparticles. Reaction conditions like time, temperature, and gas flow rate can be adjusted to control the nanoparticle size, with smaller sizes exhibiting stronger surface-related photoluminescence. This new method allows for the low-temperature physical synthesis of high-quality ZnO nanoparticles suitable for applications in flexible electronics and optoelectronics.
This document summarizes a study on direct laser writing of fluorescent microstructures containing silver nanoclusters in polyvinyl alcohol films. Key points include:
- Silver nanoclusters below 2nm exhibit strong fluorescence and were stabilized in polyvinyl alcohol films.
- A direct laser writing technique was used to fabricate fluorescent microstructures by locally inducing photopolymerization in the films containing silver nanoclusters.
- Results found the fluorescence intensity of the structures increased with higher silver concentration and higher laser writing power. Spectroscopy also identified a sharp fluorescence peak attributed to surface plasmon resonance.
- The technique can potentially be used for applications such as bioimaging and optical data storage due to the photostability of
Nanophysics the physics of structures and artefacts with
dimensions in the nanometer range or of
phenomena occurring in nanoseconds. Nanoscience is the study of atoms, molecules and object whose size is of the nanometer scale (1-100nm).
This document summarizes a student project on the synthesis of zinc selenide (ZnSe) nanocrystals. ZnSe nanocrystals were successfully synthesized using a solvo-thermal method with zinc chloride, selenium powder, ethylene glycol and hydrazine hydrate. The nanocrystals were characterized using X-ray diffraction and Fourier transform infrared spectroscopy. The ZnSe nanocrystals were found to be highly crystalline with a narrow size distribution. Potential applications investigated include cancer detection by analyzing blood samples with infrared spectroscopy using ZnSe, and improving the performance of solar cells.
This document discusses various methods for synthesizing nanomaterials, including top-down and bottom-up approaches. The top-down approach involves breaking down bulk materials into nanoparticles, using methods like attrition and lithography. The bottom-up approach involves building nanoparticles from molecular precursors using methods like pyrolysis, solvothermal processes, and sol-gel techniques. These synthetic methods allow for the production of nanomaterials with applications in areas like drug delivery, coatings, and imaging. Further development could improve biological imaging and cancer treatment.
The Facilitation Center for Industrial Plasma Technologies (FCIPT) was established in 1997 by the Institute for Plasma Research to transfer plasma technology knowledge to Indian industries. FCIPT has developed numerous plasma processes and transferred technologies such as plasma pyrolysis for waste treatment and plasma nitriding for surface hardening. FCIPT's areas of expertise include surface engineering, environmental remediation, modeling, and contract research. It provides plasma processing services and assists with technology development.
This document discusses atomic layer deposition (ALD) applications, films, deposition characteristics, and processes. It summarizes that ALD can be used to deposit thin, conformal films for applications in semiconductors, optics, MEMS, and more. ALD works by separating gas precursors and allows for precise, digital thickness control at the atomic scale through self-limiting surface reactions.
Preparation and Stability of Nanofluids-A ReviewIOSR Journals
Nanofluid, a simple product of nanotechnology has become a topic of attraction due to its
extraordinary heat transfer performance in various areas including cooling, power generation, defense,
nuclear, space, microelectronics and biomedical appliances. However, preparation and stabilization of such
fluids are indeed a matter of concern for better understanding. For the last decade numerous research and
development works have been done in the synthesis and stability of such materials. In this contribution, a brief
review has been presented to provide an update about the preparation and stabilization methods of nanofluids
A Review of Zinc-Oxide as Nano Materials and Devicesidescitation
This paper presents a review of zinc oxide (ZnO) as
nano material and device. ZnO has gained substantial interest
in the research area of wide band gap semiconductors due to
its unique electrical, optical and structural properties.
Recently, ZnO as nano material generates much interest
among researchers and technologists and have been used in
many devices such as UV photodetectors, light emitting diodes,
solar cells and transistors. Moreover, a brief overview on ZnO
recent advances on nanoparticles, nanowires and their
applications as devices are discussed and reviewed.
This document describes a project on the formation of PbS thin films using the chemical bath deposition technique. The aims are to deposit PbS thin films using CBD, study the effect of different precursor solutions, and characterize the films using XRD. CBD is described as a low-cost deposition method using controlled chemical reactions. Procedures for depositing PbS films using lead acetate and lead nitrate precursors are provided. XRD results show the films are PbS cubic crystals with grain sizes of 41.9nm and 45.44nm for lead nitrate and acetate, respectively. Conductivity tests show the films are p-type. The effect of varying lead concentration is also studied.
The document discusses nanomaterial synthesis methods. It begins with an introduction to nanotechnology and challenges in the field. It then covers bottom-up and top-down approaches to nanomaterial synthesis. Specific synthesis methods covered include evaporation and condensation growth, lithography technology, and methods for creating nano-composites. A variety of nanoparticle synthesis techniques are also discussed.
This document discusses diamond films and devices, focusing on the chemistry, electronics, and mechanics. It provides background on the history of natural and synthetic diamond production. Synthetic diamond can be produced through high pressure high temperature (HPHT) and chemical vapor deposition (CVD) techniques. CVD allows control over diamond film properties and growth on various substrates. The document discusses diamond's chemical properties like hydrogen and oxygen surface termination, its electronic properties including doping to enable conductivity, and surface conductivity. Finally, it mentions diamond's superior mechanical properties for micro- and nano-electromechanical systems.
The Laboratory of Vacuum Technologies develops and produces vacuum components and customized coating deposition systems. It offers magnetrons, ion beam sources, plasma generators, and other vacuum equipment. The laboratory has expertise in magnetron sputtering, ion beam cleaning and etching, plasma nitriding, evaporation, and other vacuum coating processes. It also provides engineering consulting, maintenance services, and refurbishment of existing vacuum process tools. Key capabilities include high deposition rates up to 40 μm/min, large area etching, and customized systems for specialized applications.
The document summarizes different methods for synthesizing cadmium sulfide (CdS) nanoparticles. It describes an aqueous precipitation method using cadmium nitrate and sodium sulfide precursors that produces yellow CdS precipitate. It also outlines a sol-gel method using cadmium acetate, diaminobenzene, and thioacetamide precursors that generates a CdS sol and gel. Additionally, it mentions a hydrothermal method using cadmium nitrate, thiourea, and hexamethylenetetramine precursors under high temperature and pressure that can control CdS morphology. The document provides an overview of various preparation techniques for CdS nanoparticles.
Synthesis, Characterization of ZnS nanoparticles by Coprecipitation method us...IOSR Journals
ZnS nanoparticles are prepared by coprecipitation method using various capping agents like PVP (polyvinylpyrrolidone), PVA (polyvinylalcohol) and PEG-4000 (polyethyleneglycol). These are characterized by UV-Visible spectra, X-ray diffraction (XRD) studies, Fourier Transform Infra-red spectra (FTIR) and Transmission electron microscopy (TEM). UV-Visible absorption spectra are used to find the optical band gap and the values obtained have been found to be in the range of 3.80-4.00eV. The particle size of nanoparticles calculated from XRD pattern has been in the range of 2-4 nm. It is also observed that the particle size of nanoparticle is affected by the nature of capping agent. Photo catalytic degradation of xylenol orange (XO) by the nanoparticles shows that these act as photo catalysts under sunlight irradiation. The XO dye was degraded more than 87.24, 83.42 and 73.05% in the presence of PEG-4000, PVA and PVP capped ZnS nanoparticles in 120, 150 and 180 min. respectively. The kinetics of catalyzed by synthesized ZnS nanoparticles with XO dye follows pseudo-first order kinetics with reasonable apparent rate constants.
This master's thesis investigates methods for producing mesoporous titania microspheres with high surface area for use in dye-sensitized solar cells (DSSCs). The sol-gel method is employed using supramolecular self-assembly templating with folic acid to generate titania. Additional methods using acetylacetone and atrane are explored to decrease the hydrolysis rate and achieve smaller pore sizes. Formation of titania microspheres through spray-drying is also investigated to increase surface area. Characterization shows the materials have low crystallinity and surface areas below the goals for DSSC application due to constraints requiring pH > 7. The conclusion is acidic conditions are essential for anatase crystallization, and decreasing
Kristy Wendt has extensive experience characterizing materials using various microscopy techniques. She has worked with clients from Washington University to analyze samples ranging from nanoparticles to biological tissues. Wendt enjoys developing new processing protocols to image challenging samples. She also trains others and collaborates across facilities to further characterization capabilities.
This document summarizes research on the effect of different organic solvents and annealing temperatures on the optical properties of TiO2 nanoparticles. Specifically, it finds that using benzyl alcohol as the solvent instead of ethanol results in larger particle sizes of 40-60 nm compared to 20-30 nm. This is because benzyl alcohol has a higher boiling point, allowing more time for nucleation and growth. The larger particles have a lower band gap, absorbing visible light up to 400 nm instead of 350 nm. Overall, the solvent's boiling point influences particle size, which then affects the optical properties of the TiO2 nanoparticles.
Quantum dots for optoelectronic devices - phdassistancePhD Assistance
Nanometre-scale semiconductor chips have been imagined as next-generation technology with high functionality and convergence. Quantum dots, also known as artificial atoms, have special properties owing to their quantum confinement in all three dimensions. Quantum dots have a lot of interest in optoelectronic systems because of their special properties.
For decades, self-assembled nanostructures have been a topic of considerable concern and significance.
Learn More:https://bit.ly/3xJJAiZ
Contact Us:
Website: https://www.phdassistance.com/
UK: +44 7537144372
India No:+91-9176966446
Email: info@phdassistance.com
The manufacturing of microprocessors involves growing pure silicon crystals, slicing wafers, and fabricating integrated circuits through repeated photolithography, etching, deposition, and doping steps in a clean room environment. Key steps include slicing silicon ingots into wafers, layering and patterning materials like insulators and conductors through photolithography and etching, and implanting dopants using ion implantation. After fabrication, the wafers are tested, cut into chips, and packaged into protective casings before use in electronic devices.
Low Temperature Synthesis of ZnO Nanoparticlescurtistaylor80
This document summarizes a new low-temperature vapor phase transport process for synthesizing ZnO nanoparticles. ZnO powder and carbon are used as precursors and decomposed at temperatures as low as 225°C to form ZnO nanoparticles. Reaction conditions like time, temperature, and gas flow rate can be adjusted to control the nanoparticle size, with smaller sizes exhibiting stronger surface-related photoluminescence. This new method allows for the low-temperature physical synthesis of high-quality ZnO nanoparticles suitable for applications in flexible electronics and optoelectronics.
This document summarizes a study on direct laser writing of fluorescent microstructures containing silver nanoclusters in polyvinyl alcohol films. Key points include:
- Silver nanoclusters below 2nm exhibit strong fluorescence and were stabilized in polyvinyl alcohol films.
- A direct laser writing technique was used to fabricate fluorescent microstructures by locally inducing photopolymerization in the films containing silver nanoclusters.
- Results found the fluorescence intensity of the structures increased with higher silver concentration and higher laser writing power. Spectroscopy also identified a sharp fluorescence peak attributed to surface plasmon resonance.
- The technique can potentially be used for applications such as bioimaging and optical data storage due to the photostability of
Nanophysics the physics of structures and artefacts with
dimensions in the nanometer range or of
phenomena occurring in nanoseconds. Nanoscience is the study of atoms, molecules and object whose size is of the nanometer scale (1-100nm).
This document summarizes a student project on the synthesis of zinc selenide (ZnSe) nanocrystals. ZnSe nanocrystals were successfully synthesized using a solvo-thermal method with zinc chloride, selenium powder, ethylene glycol and hydrazine hydrate. The nanocrystals were characterized using X-ray diffraction and Fourier transform infrared spectroscopy. The ZnSe nanocrystals were found to be highly crystalline with a narrow size distribution. Potential applications investigated include cancer detection by analyzing blood samples with infrared spectroscopy using ZnSe, and improving the performance of solar cells.
This document discusses various methods for synthesizing nanomaterials, including top-down and bottom-up approaches. The top-down approach involves breaking down bulk materials into nanoparticles, using methods like attrition and lithography. The bottom-up approach involves building nanoparticles from molecular precursors using methods like pyrolysis, solvothermal processes, and sol-gel techniques. These synthetic methods allow for the production of nanomaterials with applications in areas like drug delivery, coatings, and imaging. Further development could improve biological imaging and cancer treatment.
The Facilitation Center for Industrial Plasma Technologies (FCIPT) was established in 1997 by the Institute for Plasma Research to transfer plasma technology knowledge to Indian industries. FCIPT has developed numerous plasma processes and transferred technologies such as plasma pyrolysis for waste treatment and plasma nitriding for surface hardening. FCIPT's areas of expertise include surface engineering, environmental remediation, modeling, and contract research. It provides plasma processing services and assists with technology development.
This document discusses atomic layer deposition (ALD) applications, films, deposition characteristics, and processes. It summarizes that ALD can be used to deposit thin, conformal films for applications in semiconductors, optics, MEMS, and more. ALD works by separating gas precursors and allows for precise, digital thickness control at the atomic scale through self-limiting surface reactions.
Preparation and Stability of Nanofluids-A ReviewIOSR Journals
Nanofluid, a simple product of nanotechnology has become a topic of attraction due to its
extraordinary heat transfer performance in various areas including cooling, power generation, defense,
nuclear, space, microelectronics and biomedical appliances. However, preparation and stabilization of such
fluids are indeed a matter of concern for better understanding. For the last decade numerous research and
development works have been done in the synthesis and stability of such materials. In this contribution, a brief
review has been presented to provide an update about the preparation and stabilization methods of nanofluids
A Review of Zinc-Oxide as Nano Materials and Devicesidescitation
This paper presents a review of zinc oxide (ZnO) as
nano material and device. ZnO has gained substantial interest
in the research area of wide band gap semiconductors due to
its unique electrical, optical and structural properties.
Recently, ZnO as nano material generates much interest
among researchers and technologists and have been used in
many devices such as UV photodetectors, light emitting diodes,
solar cells and transistors. Moreover, a brief overview on ZnO
recent advances on nanoparticles, nanowires and their
applications as devices are discussed and reviewed.
This document describes a project on the formation of PbS thin films using the chemical bath deposition technique. The aims are to deposit PbS thin films using CBD, study the effect of different precursor solutions, and characterize the films using XRD. CBD is described as a low-cost deposition method using controlled chemical reactions. Procedures for depositing PbS films using lead acetate and lead nitrate precursors are provided. XRD results show the films are PbS cubic crystals with grain sizes of 41.9nm and 45.44nm for lead nitrate and acetate, respectively. Conductivity tests show the films are p-type. The effect of varying lead concentration is also studied.
The document discusses nanomaterial synthesis methods. It begins with an introduction to nanotechnology and challenges in the field. It then covers bottom-up and top-down approaches to nanomaterial synthesis. Specific synthesis methods covered include evaporation and condensation growth, lithography technology, and methods for creating nano-composites. A variety of nanoparticle synthesis techniques are also discussed.
This document discusses diamond films and devices, focusing on the chemistry, electronics, and mechanics. It provides background on the history of natural and synthetic diamond production. Synthetic diamond can be produced through high pressure high temperature (HPHT) and chemical vapor deposition (CVD) techniques. CVD allows control over diamond film properties and growth on various substrates. The document discusses diamond's chemical properties like hydrogen and oxygen surface termination, its electronic properties including doping to enable conductivity, and surface conductivity. Finally, it mentions diamond's superior mechanical properties for micro- and nano-electromechanical systems.
The Laboratory of Vacuum Technologies develops and produces vacuum components and customized coating deposition systems. It offers magnetrons, ion beam sources, plasma generators, and other vacuum equipment. The laboratory has expertise in magnetron sputtering, ion beam cleaning and etching, plasma nitriding, evaporation, and other vacuum coating processes. It also provides engineering consulting, maintenance services, and refurbishment of existing vacuum process tools. Key capabilities include high deposition rates up to 40 μm/min, large area etching, and customized systems for specialized applications.
Anirudha V. Sumant considers how diamond thin films are making a comeback after slowing down in the late 1990s due to technological hurdles. Researchers at Argonne National Laboratory invented ultrananocrystalline diamond (UNCD) in 1998, which has grain sizes of 2-5 nm, low roughness, and high hardness and conductivity. UNCD was found to have applications in areas like electrodes, sensors, and coatings. Recent research has shown that UNCD can be deposited at 400°C, allowing integration with semiconductor materials, and its smooth and conductive properties make it suitable for electronic devices. The technology of CVD diamond films has advanced to the point that commercial applications are emerging and the "diamond age
The document discusses various applications of nanomaterials. It describes how nanotechnology is used in industries like automotive, engineering, medicine, cosmetics and textiles. It also discusses energy applications like nanofabrication for new ways to capture, store and transfer energy. Pharmaceutical applications of nanomaterials include drug delivery, tissue engineering, medical implants and diagnostics. Nanotechnology is also used in water purification through processes like nanofiltration and reverse osmosis. Thin film solar cells and dye sensitized solar cells that use nanomaterials are discussed as energy applications. Perovskite solar cells which can achieve high efficiencies are also summarized.
Microwave Plasma CVD Reactors for Growing Diamond in the Laboratory-Crimson P...CrimsonPublishersRDMS
This document summarizes the design considerations for microwave plasma CVD reactors used to grow diamond in laboratories. It discusses how the geometry of the vacuum chamber, microwave frequency, coupling efficiency, gas flow, and microwave transparent windows are critical factors. Cylindrical reactors are commonly used to create standing microwaves for plasma formation, but other shapes like ellipsoidal and conical are also possible. The document also provides background on the CVD process and considerations for vacuum systems, temperature monitoring, and gas delivery components.
This lecture discusses different types of solar cells. Generation I solar cells include single crystal and polycrystalline silicon cells which are the most common currently but are expensive. Generation II cells include thin film technologies like amorphous silicon, cadmium telluride, and copper indium diselenide which offer lower costs but have lower efficiencies. Generation III cells aim for higher efficiencies and include multi-junction concentrator cells using exotic materials, dye-sensitized solar cells, organic cells, and nanostructured cells. The lecture discusses the materials, structures, and production processes for different cell types.
This document discusses carbon nanotube synthesis using chemical vapor deposition (CVD) methods. It describes thermal CVD and laser-assisted thermal CVD processes. For thermal CVD, a hydrocarbon gas is decomposed over a transition metal catalyst at temperatures of 450-1050°C to grow multi-walled nanotubes with diameters from 10-240nm or single-walled nanotubes with diameters from 0.6-4nm. For laser-assisted CVD, a CO2 laser pyrolyzes iron pentacarbonyl and ethylene or acetylene vapors to produce single-walled nanotubes with diameters from 0.7-2.5nm and multi-walled nanotubes with
This document discusses micro-machining of ceramic components. It provides an overview of machining technologies for ceramics including electrical discharge machining, laser machining, water jet machining, and milling. It also describes the University of Leuven's activities in developing new ceramic materials and machining processes for ceramics. Examples of micro-machined ceramic components are given for different materials and processes.
Carbon Nanotubes Membranes: Application in Water TreatmentIRJET Journal
This document discusses the application of carbon nanotube (CNT) membranes for water treatment. It begins by providing background on nanotechnology applications for water purification and desalination. It then focuses on CNT membranes, discussing their fabrication via chemical vapor deposition and analyzing their effectiveness. CNT membranes are found to have higher water permeability and salt rejection compared to conventional reverse osmosis and nanofiltration membranes. The document also examines functionalized CNT membranes where carboxylic CNTs are reacted with polyethylene glycol to increase mechanical properties. In conclusion, CNT membranes show potential for improved water treatment but require further research to enhance performance and reduce costs.
This document summarizes the fabrication and characterization of nanowire devices. It discusses the early history of nanotechnology and how the field has progressed. Various methods for synthesizing semiconductor nanowires are described, including vapor-liquid-solid growth and electrodeposition. The document shows images of nanowires made from materials like copper, cadmium sulfide, and zinc oxide. It also discusses the unique electrical and optical properties of nanowires and their potential applications in areas such as electronics, optoelectronics, and sensing. In conclusion, the author remarks that nanowires may serve as important building blocks for next-generation electronic and optoelectronic systems by enabling new device concepts.
electrochemical discharge machining.
also known as electrochemical spark machining.
we covert normal drilling machine in electrochemical spark machining and perform drilling operation on the work piece and create a macrohole in a quartz glass. the results are shown in the ppt.
we created this project under the head of department of mechanical engineering ER. Rakesh sigh sir and ER.mudit tyagi sir from mtech department from noida institute of engineering and technology, greater noida.
This document discusses Oxford Instruments' nanotechnology tools for synthesizing 2D materials. It summarizes their portfolio including MBE systems for wafer-scale graphene growth, cluster tools for combining growth and analysis, CVD and PECVD tools for applied research and pilot production, and ALD systems for dielectric deposition. Oxford Instruments has experience developing tools to meet emerging industry needs and providing long-term support for customers moving processes from lab to fabrication. Key challenges for 2D materials include scaling production while maintaining quality and reliability.
This document discusses Oxford Instruments' nanotechnology tools for synthesizing 2D materials. It summarizes their portfolio including MBE systems for wafer-scale graphene growth, cluster tools for combining growth and analysis, CVD and PECVD tools for applied research and pilot production, and ALD systems for dielectric deposition. Oxford Instruments has experience developing tools to meet emerging industry needs and providing long-term support for moving techniques from lab to fabrication. Key challenges in commercializing 2D materials include reducing growth costs, developing integration methods, and ensuring process reliability and automation.
This document describes research into using pulsed anodic arc discharges to synthesize carbon nanomaterials. Pulsed arcs with frequencies of 1-5 Hz and a 10% duty cycle were generated between graphite electrodes in a helium atmosphere. Plasma parameters like electron density (1016-1017 m-3) and temperature (0.5-2.0 eV) were measured. Carbon nanostructures like graphene nanoplatelets and carbon nanotubes were deposited on the cathode. Pulsed arcs showed higher peak currents than steady DC arcs but did not reach steady state levels. This pulsed method could improve control over carbon nanomaterial synthesis compared to conventional DC arcs.
Nanocell is developing cellglow which uses cadmium selenide quantum dots as fluorescent markers. Quantum dots are synthesized using precursors and surfactants then heated to control crystal growth. Applications include white LEDs by tuning quantum dot wavelength, solar cells by using quantum dots as electron acceptors, and biomedical imaging by tagging quantum dots to agents to light up cancer cells. While quantum dots have advantages over dyes, cadmium selenide is toxic requiring a polymer shell, and particle size control is difficult.
1. Commercialisation of the CVD-production technology of diamond films
The project resume
The project The organisation of manufacture of plates and products from polycrystalline and monocrystal CVD-
purpose diamondfor electronic componental base, optics and wearproof coverings.
Production At the initial stage:
The project •Heat-removing plates from polycrystalline diamond;
•Diamond optical windows, including on a range of the microwave oven and ВЧ frequencies;
•Cutting inserts from a diamond composite;
•Services in laser processing of diamond products;
Further:
•Monocrystal momchromators and detectors of x-ray radiation (including dosimeters of medical appointment),
monocrystal plates for the microwave oven of transistors, solar-blind UV-detectors, hard-alloy cutters with a
diamond covering, microelectromechanical systems (MEMS) on the basis of thin diamond films, difractional
optical elements from diamond.
Participants •GPI OF THE RUSSIAN ACADEMY OF SCIENCES;
The project •Company ”Optosystems".
Consumers The electronic industry enterprises (in particular, in Russia NPC "Source", NPC "Pulsar", Open
Production Company «NPP TEZ», Open Society "Octave");
Manufacturers of the optical equipment, lasers (in Russia FSC "Astrophysics", НТО "IRE-POLUS",
etc.);
Manufacturers of components and tools with a diamond covering(space sector, mechanical
engineering, the medical equipment).
Realisation The first stage:
of the project •Manufacture of separate electronic, optical and mechanical elements from CVD-diamond.
The second stage:
•Manufacture of difficult products on the basis of elements from CVD-diamond.
Improvement of the production technology of monocrystal and polycrystalline CVD-diamond during all
project.
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2. The characteristic of the Innovative project
CVD-diamond use
CVD-diamondtype Use areas
CVD-diamond of Covering of tools, details (for example,
mechanical quality engine details, surgical tools, implants,
drills)
CVD-diamond of optical Windows and mirrors (for example, lasers)
quality
CVD-diamond of Heat-removing plates (electronics, laser
thermal/electro-technical diodes)
quality
CVD-diamond as a Ionising radiationdetectors (including
sensor element medical detectors)
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3. The characteristic of the Innovative project
Existing methods of reception of CVD-diamond
Method The short description Advantages and lacks
Method of a hot Activation of a gas phase about use heated to temperature ~ The big advantage of a method is simplicity and scaling possibility.
thread 20000Ca wire from the refractory material, placed about a Method lack is the basic impossibility to prevent occurrence of an impurity of
substrate on which the diamond film is increased and which is metal-activator in a film that is important at reception very much a clear
supported at temperature 700-10000C. Pressure of a gas phase diamond, and also impossibility of introduction in a gas mix of the additives
usually makes 20-60 Torr, and distance between a wire-activator actively co-operating with a material of the activator.
and a substrate of 4-10 mm.
Gas activation in a In the elementary case process is conducted on atmosphere, and Use of torches in reactors at the lowered pressure allows to increase the area
torch flame there is no necessity for the reactor. Use of an oxygen-acetylene of sedimentation and to improve control over a process course. However at the
torch allows to receive high concentration of radicals and speed expense of increase in the area of a covering speed of sedimentation without
of sedimentation of diamond can reach 100 micron/hour. an appreciable prize in quality decreases.
The direct current In typical conditions (pressure of 100 Torr, temperature 8000С, Sedimentation in plasma of the category of a direct current allows to receive
category the expense of gas of 5-6 l/hour, size of a current 1,5-2,5) are diamond films with speeds in tens micrometers at an o'clock. Besides high
reached speeds 10 micron/hour on substrates by the area of 1 growth rates advantages of a method are simplicity of process, low
sm2. consumption of gas, however pollution of a film by products of dispersion of
electrodes is inherent in a method.
Electroarc In electroarc plasmotron the gas which is heated up in the Owing to high degree of decomposition of gas-reagent, high concentration of
plasmotron category of a direct current in the cylindrical channel, expires atomic hydrogen of speed of sedimentation of diamond reach the big sizes.
through a nozzle, forming a high-speed stream with temperature
in a kernel of a stream to 40000ºС
Laser plasmotron Heating of a gas stream in such плазмотроне is carried out by Speeds of sedimentation 40-60 micron/hour on substrates by the area of an
plasma of the continuous optical category supported by order of 1 sm2 are reached. Increase in speed and the sedimentation area it is
continuous laser radiation. possible to expect at higher laser capacity but while this method develops only
at laboratory level.
The microwave In the vacuum chamber the mix of methane and hydrogen which Allows to reach:
oven plasma dissociate under the influence of the electric category, microwave •It is unprecedented the big sizes;
(It is used in the plasma, laser radiation, on a hot thread or otherwisemoves. •High reproducibility of physical parametres;
project) Products dissociations are delivered to heated to a substrate, and •Possibilities of cultivation of products of the set form;
are besieged in the form of diamond. •Possibilities of drawing of coverings on a surface of various materials.
CVD diamond does not contain neither a time, nor a binding material and
consequently shows properties coming nearer to properties of monocrystals of
diamond.
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4. The characteristic of the Innovative project
The equipment and production
System of sedimentation of CVD-diamond GPI the Russian Academy of Sciences
CVD-diamondmonocrystals
Plates of the polycrystalline
CVD-diamond
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5. The characteristic of the Innovative project
Comparison of production with analogues
Heat-removing plates CVD of diamond
Comparison Values of parametres
parametres
The flowing On 2014год
Project product Analogue of a Project product The best analogue
product (forecast)
Heat-removing plates Plates CVD of Heat-removing plates Heat-removing plates
CVD of diamond in diamond of marks CVD of diamond. (ElementSix).
the size from 5х5 TM100and ТМ180,
mm2 to 20х20mm2, a the size 10х10 мм2, a
thickness of 0,25-0,50 thickness of 0.25 mm
mm. (ElementSix).
1. Heat conductivity, 800-2000 1000 – 1800 1000-1800 1000 – 1800
Vt/mK
2. Specific resistance, >1011 >1012 >1012 >1012
Om*sm
3. A surface roughness, 90 50 50 50
nanometer
Market cost of unit of a 90 - 250 68 -140 50 - 130 50 – 130
product, rbl./mm3 (Without the VAT)
The approximate cost 75 - 200 Not data 30 - 100 Not data
price of unit of a
product, rbl./mm3
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6. The characteristic of the Innovative project
Comparison of production with analogues
Diamond windows
Comparison Values of parametres
parametres
The flowing On 2014год
Project product Analogue of a Project product The best analogue
product (forecast)
Diamond windows, Plates CVD of diamond Plates CVD of diamond Plates CVD of diamond
diameter of 8 mm – 25 marked OP, diameter of optical quality of optical quality
mm. 8мм, a thickness of 0.5 (ElementSix).
mm (ElementSix).
1. Heat conductivity, 1800-2000 1900 1900-2000 2000
Vt/mK
2. Coef. Optical 0,06 – 0,12 <0,10 <0,08 <0,08
absorption on length of
a wave 10,6 microns,
Sm-1
3. A surface roughness, <30 <30 <30 <30
nanometer
Market cost of unit of a 350 400 300 350
product, rbl./mm3
The approximate cost 250 Not data 200 Not data
price of unit of a
product, rbl./mm3
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7. The characteristic of the Innovative project
Comparison of production with analogues
Cutting inserts from a hybrid diamond composite (ГАКТМ).
Comparison Values of parametres
parametres The flowing On 2014год
Project product Analogue of a Project product The best analogue
product (forecast)
Cutting inserts from hybrid Cutting inserts from Cutting inserts from hybrid Cutting inserts from
diamond composite diamond composite АКТМ diamond composite diamond composite АКТМ
GAKTM (concern ”Alcon"). GAKTM for chisel heads (concern ”Alcon").
1. Hardness, GPa 120-140 (in a CVD- 50 110-120 (in a CVD- 50
diamondreinforcing diamondreinforcing
element); element);
50 (in polycrystalline to 50 (in polycrystalline to
cover АКТМ) cover АКТМ)
2. The sizes Diameter 4,0 mm, Diameter 4,0 mm, Diameter 8,0 mm, Diameter 8,0 mm,
Height of 4,5 mm Height of 4,5 mm Height of 4,0 mm Height of 4,0 mm
3. Wear resistance (rather 5-14 1 >6 1
АКТМ) at granite
processing
Market cost of unit of a 350 230 250 230
product, rbl./mm3
The approximate cost 250 Not data 120 Not data
price of unit of a
product, rbl./mm3
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8. The market characteristic
Potential consumers and partners
Manufacturers of powerful technological lasers (target windows), including – TRUMPF GmbH +
Co. KG (Germany), Siemens AG (Germany);
Manufacturers of measuring instruments of energy of powerful bunches (entrance windows),
including – Coherent Inc. (USA), Ophir Optronics Ltd. (Israel), Newport Corp. (USA);
Manufacturers of gauges and microelectronic structures (substrate), including – Open Society
”Angstrem" (Russian Federation), Open Society "Micron" (Russian Federation), Samsung
Electronics (Korea), LG Electronics (Korea);
Manufacturers of extruders (filters), including – Balloffet (France), FortWayneWireDie, Inc.
(USA), Open Company «KSD-Ekstruder);
Manufacturers of tools with a diamond covering, tool factories;
Research institutes and the companies, including – Research institute of industrial technologies
(Taiwan), K Jet Laser Tek Inc. (Taiwan), institutes of the Russian Academy of Sciences.
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9. The market characteristic
Potential volume of the market
The markets of the products potentially using components
on the basis of CVD-diamond: The market of diamond coverings, million$
350 25
The world market of diamond and diamondlike coverings
by estimations in 2009 made $782 million. Growth to $1,7 300
19,7 19,5
20
billion by 2015 Is predicted.
250
The world market of lasers in 2010 made $5,91 billion, 14,9
Темп роста рынка
Млн. долл. США
13,8 15
growth to $8,8 billion by 2014 is expected. 200
In 2007 the market of diamond stomatologic pine forests 150
319
10
was estimated in $75 million 196 223 267
100
It is expected that the market of surgical tools will grow to 170
5
$7 billion by 2016. 50
The market medical implants makes 10$ billion and
0 0
steadily grows. 2005 2006 2007 2008 2009
Source: company Abercade
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10. The market characteristic
The analysis of competitors
Diamonds both diamondlike thin and thick films have outstanding properties. In this sense of competitive materials is
not present in general, therefore it is possible to speak only about materials with more poor quality, but it is essential
lower price:
For the cutting tool alternatively it is possible to consider ceramics and tungsten carbide.
Iznosoustojchivyh coverings as alternative the ceramic covering can act.
Electronic industry as alternative aluminium nitride can act, but besides here at diamondlike films of a competitive product does not exist, so far as
concerns tiny and high-efficiency requirements/processes.
For optical components of competitive products does not exist, since is not present optically transparent materials in so wide optical range as diamond.
But here the market grows insufficiently quickly because of for the present concerning the high price.
In the world the largest companies which are engaged in production from diamond plates, are:
AIXTRON AG (12 % of world market CVD of coverings), Innovative Plasma Systems GmbH, Germany
Applied Diamond, Inc., sp3 Diamond Technologies, Didco Inc., THE USA
Hebei Plasma Diamond Technology Co., Ltd, East Diamond Industrial Co., Ltd., Simple Technology, Inc., China
Element Six Ltd, Great Britain
Seki Technotron Corpю, Japan
CVD Diamond Corporation, Canada
Awin Diamond Technology Corp., Taiwan
The general competitive advantage of the above-stated companies-competitors is their long enough presence in the market. Also doubtless advantage are
financial possibilities of first two companies. It is necessary to notice that expenses on research and development AIXTRON AG (Germany) have made
in 2007 about 30 million euro. All is more considerably felt presence in the market of the Chinese companies.
Competitive advantages of production which is let out within the limits of the project:
High speed of cultivation of diamond plates.
Presence of technology for cultivation of samples with the best optical properties.
Presence of technologies for creation nanostructures on diamond, including cultivation of diamonds doped with boron components for creation of
diamonds with electrospending components.
High quality of production.
Essential price advantage in the Russian market, including at the expense of absence of the customs duties for the Russian buyers.
High level of service from the company-manufacturer and the grantings of technologies expanded possibilities under the concrete client.
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11. The characteristic of the applicant
The centre of physical instrument GPI the Russian Academy
of Sciences
Technology of cultivation of diamond in microwave plasma
Open Company ”Optosystems"
The company develops and makes systems for a laser dusting,
microdrilling and microprocessing and exclusive installations for
the Russian market for plasmochemical cultivation micro- and
nanocrystalline diamond films and plates.
Professor Gennaro Conte
Researches in sphere of optimisation of systems of cultivation of
diamond, creation EV and x-ray detectors on a basis mono- and
polycrystalline CVD-diamond
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12. Risks
Risks of the project
The risk description Minimisation
Technology reproduction abroad on the basis of open Patenting abroad.
publications of collective IOF of the Russian Academy of
Sciences.
Insufficiently high quality of processing of plates-preparations Preliminary performance of research and development
(essential deviations from planeness, insufficiently low (Working out of technology of polishing and polishing of
roughness of a finishing surface). diamond plates) is necessary
Competition from the largest player – ElementSix and the Granting of experimental batches of production, competitive
Chinese manufacturers price.
Probability of occurrence of new players in the market, with the Priority performance of works on a research and development
low cost price of production. Patent restrictions. theme.
Carrying out of profound patent search.
Risk of leaving of key members Forming of the confidential
Existing command Relations with management
The companies.
The optsionnaja program for
Management.
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