Bionanotechlogy like nanomedicine and nanobiosensors based on molecular plasmonics. Using the application of localized surface plasmon resonance based on EM. SERS raman spectoscopy and many more application.
Surface Plasmon Resonance,
Surface Plasmons:
Plasmons confined to surface (interface) and interact with light resulting in polarities.
Propagating electron density waves occurring at the interface between metal and dielectric.
Cathodoluminescence in Geosciences - DELMICDelmic B.V.
Cathodoluminescence imaging is an ideal tool for studying geological samples and to get an additional contrast and spectroscopic information down to the resolution of a scanning electron microscope.
The SPARC is a high-performance cathodoluminescence detection system that is designed and produced by Delmic. With this system, Delmic offers a unique solution for cathodoluminescence imaging, especially geology application.
With this presentation, you can get an insight into different aspects of cathodoluminescence on the topic. For questions about cathodoluminescence and the SPARC, please leave a comment below or visit www.delmic.com and send us a message.
If you would like to download more application notes about cathodoluminescence in geosciences, please find them at this link:
http://www.delmic.com/geology
What is time-resolved cathodoluminescence?Delmic B.V.
Time-resolved cathodoluminescence is a technique in which the time dynamics of the cathodoluminescence emission process is observed.
This presentation will give you an overview of the time-resolved cathodoluminescence techniques: lifetime imaging (or emission decay) and g(2) imaging, which is also known in physics as second-order correlation function.
The SPARC is a high-performance cathodoluminescence detection system designed and produced by Delmic, which offers a unique solution for cathodoluminescence imaging. With the Delmic LAB Cube (a time-resolved CL module) for the SPARC, it is possible to extend the SPARC to do lifetime and antibunching experiments.
For questions about cathodoluminescence, the SPARC and the LAB Cube, please leave a comment below or
visit www.delmic.com and send us an email.
Cathodoluminescence for Gallium Nitride Semiconductor MaterialsDelmic B.V.
Cathodoluminescence can be used to study ceramics, dielectrics and semiconductors (both in bulk and nanostructured materials) and to determine their light-emitting properties at the nanoscale.
This presentation helps you to understand how cathodoluminescence works and its application for gallium nitride semiconductor materials.
The SPARC is a high-performance cathodoluminescence detection system that is designed and produced by Delmic. Using our cathodoluminescence system, you will get a valuable source of information and a full experimental freedom with an open-source software and modularity of the system.
For questions about cathodoluminescence and the SPARC, please leave a comment below or visit www.delmic.com and send us a message.
If you would like to download more application notes about cathodoluminescence for materials science please find them at this link:
http://www.delmic.com/cathodoluminescence-materials-science
Surface Plasmon Resonance,
Surface Plasmons:
Plasmons confined to surface (interface) and interact with light resulting in polarities.
Propagating electron density waves occurring at the interface between metal and dielectric.
Cathodoluminescence in Geosciences - DELMICDelmic B.V.
Cathodoluminescence imaging is an ideal tool for studying geological samples and to get an additional contrast and spectroscopic information down to the resolution of a scanning electron microscope.
The SPARC is a high-performance cathodoluminescence detection system that is designed and produced by Delmic. With this system, Delmic offers a unique solution for cathodoluminescence imaging, especially geology application.
With this presentation, you can get an insight into different aspects of cathodoluminescence on the topic. For questions about cathodoluminescence and the SPARC, please leave a comment below or visit www.delmic.com and send us a message.
If you would like to download more application notes about cathodoluminescence in geosciences, please find them at this link:
http://www.delmic.com/geology
What is time-resolved cathodoluminescence?Delmic B.V.
Time-resolved cathodoluminescence is a technique in which the time dynamics of the cathodoluminescence emission process is observed.
This presentation will give you an overview of the time-resolved cathodoluminescence techniques: lifetime imaging (or emission decay) and g(2) imaging, which is also known in physics as second-order correlation function.
The SPARC is a high-performance cathodoluminescence detection system designed and produced by Delmic, which offers a unique solution for cathodoluminescence imaging. With the Delmic LAB Cube (a time-resolved CL module) for the SPARC, it is possible to extend the SPARC to do lifetime and antibunching experiments.
For questions about cathodoluminescence, the SPARC and the LAB Cube, please leave a comment below or
visit www.delmic.com and send us an email.
Cathodoluminescence for Gallium Nitride Semiconductor MaterialsDelmic B.V.
Cathodoluminescence can be used to study ceramics, dielectrics and semiconductors (both in bulk and nanostructured materials) and to determine their light-emitting properties at the nanoscale.
This presentation helps you to understand how cathodoluminescence works and its application for gallium nitride semiconductor materials.
The SPARC is a high-performance cathodoluminescence detection system that is designed and produced by Delmic. Using our cathodoluminescence system, you will get a valuable source of information and a full experimental freedom with an open-source software and modularity of the system.
For questions about cathodoluminescence and the SPARC, please leave a comment below or visit www.delmic.com and send us a message.
If you would like to download more application notes about cathodoluminescence for materials science please find them at this link:
http://www.delmic.com/cathodoluminescence-materials-science
The presentation describes the emerging scope of Nanotechnology in the field of forensic science and criminal investigation which further strengthens the investigative measures and enriches the area of research and development in the field of forensic science
Calculation of Optical Properties of Nano ParticlePHYSICS 5535- .docxRAHUL126667
Calculation of Optical Properties of Nano Particle
PHYSICS 5535- Optical Properties Matter-Spring 2017
Raznah Yami
Outline
1. Introduction: this part gives a precise overview of the whole paper. It begins by illustrating a brief introduction and importance of Nano Particles and the theoretical approaches used for their calculation.
2. Main idea: this section provides a step-by-step in-depth analysis of recently developed theories the calculation of optical properties of nanoparticles. It also provides calculation and equations employed these approaches.
2.1 Optical Properties of Nanoparticles: this section talks about the basics principles and governing the optical behavior of Nano particles and provides in-depth knowledge of different phenomena observed while dealing with optical properties of Nano particles.
2.2 Mie-Theory: the research provides exhaustive information the study optical properties of nanoparticles using Mie theory. This research focuses on Mie theory for the calculation of optical properties of Nano particle according to which we can calculate the place of surface Plasmon resonance in optical spectra of metallic spherical nanoparticle.
2.3 Discrete Dipole Approximation method: this section enumerates sufficient information about the calculation of absorption and scattering efficiencies and optical resonance wavelengths for three commonly used classes of nanoparticles: gold Nano spheres, silica-gold Nano shells, and gold Nano rods and we examine the magneto-optical scattering from nanometer-scale structures using a discrete dipole approximation.
3. Conclusion: This section provides a summary of the most important points, which presents an overview of the practical application and calculation methods of optical properties of Nano particles talking about core principles, which therefore explain the behavior exhibited by nanoparticles.
List of figures:
Figure 1: Localized surface Plasmon resonance ,resulting from the collective oscillations of delocalized electrons in response to an external electric field
Figure 2: Absorption spectra of semiconductor nanoparticles of different diameter. Right-nanoparticles suspended in solution.
Figure 3: Comparison of absorbance along increasing wavelength between Nano GaAs (7-15 nm) and Bulk GaAs showing an apparent blue shift
Figure 4: Showing the effect of blue shift because of quantum confinement as the wavelength shifts from 1100 nm to 2000 nm when we move from particle size of 9nm to parcile size of 3 nm.
Figure 5: Emission spectra of several sizes of (Cdse) Zns core-shell quantum dots.
Figure 6: The optical spectra and transmission electron micrographs for the particles in vials 1–5 are also shown. Scale bars in micrographs are all 100 nm
Figure7: Shows the effect of varying relative core and shell thickness of gold Nano Shells, there is an apparent blue shift as the frequency increases
References:
1. . P. S. Per ...
Surface Plasmon Resonance (SPR) and its ApplicationDr. Barkha Gupta
DR. BARKHA GUPTA
ASSISTANT PROFESSOR (VETERINARY BIOCHEMISTRY)
DEPARTMENT OF VETERINARY PHYSIOLOGY AND BIOCHEMISTRY
POST GRADUATE INSTITUTE OF VETERINARY EDUCATION AND RESEARCH (PGIVER), JAIPUR RAJASTHAN UNIVERSITY OF VETERINARY AND ANIMAL SCIENCES (RAJUVAS), BIKANER
YouTube Channel: Barkha’s Vet Sphere
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
Le nuove frontiere dell'AI nell'RPA con UiPath Autopilot™UiPathCommunity
In questo evento online gratuito, organizzato dalla Community Italiana di UiPath, potrai esplorare le nuove funzionalità di Autopilot, il tool che integra l'Intelligenza Artificiale nei processi di sviluppo e utilizzo delle Automazioni.
📕 Vedremo insieme alcuni esempi dell'utilizzo di Autopilot in diversi tool della Suite UiPath:
Autopilot per Studio Web
Autopilot per Studio
Autopilot per Apps
Clipboard AI
GenAI applicata alla Document Understanding
👨🏫👨💻 Speakers:
Stefano Negro, UiPath MVPx3, RPA Tech Lead @ BSP Consultant
Flavio Martinelli, UiPath MVP 2023, Technical Account Manager @UiPath
Andrei Tasca, RPA Solutions Team Lead @NTT Data
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Welocme to ViralQR, your best QR code generator.ViralQR
Welcome to ViralQR, your best QR code generator available on the market!
At ViralQR, we design static and dynamic QR codes. Our mission is to make business operations easier and customer engagement more powerful through the use of QR technology. Be it a small-scale business or a huge enterprise, our easy-to-use platform provides multiple choices that can be tailored according to your company's branding and marketing strategies.
Our Vision
We are here to make the process of creating QR codes easy and smooth, thus enhancing customer interaction and making business more fluid. We very strongly believe in the ability of QR codes to change the world for businesses in their interaction with customers and are set on making that technology accessible and usable far and wide.
Our Achievements
Ever since its inception, we have successfully served many clients by offering QR codes in their marketing, service delivery, and collection of feedback across various industries. Our platform has been recognized for its ease of use and amazing features, which helped a business to make QR codes.
Our Services
At ViralQR, here is a comprehensive suite of services that caters to your very needs:
Static QR Codes: Create free static QR codes. These QR codes are able to store significant information such as URLs, vCards, plain text, emails and SMS, Wi-Fi credentials, and Bitcoin addresses.
Dynamic QR codes: These also have all the advanced features but are subscription-based. They can directly link to PDF files, images, micro-landing pages, social accounts, review forms, business pages, and applications. In addition, they can be branded with CTAs, frames, patterns, colors, and logos to enhance your branding.
Pricing and Packages
Additionally, there is a 14-day free offer to ViralQR, which is an exceptional opportunity for new users to take a feel of this platform. One can easily subscribe from there and experience the full dynamic of using QR codes. The subscription plans are not only meant for business; they are priced very flexibly so that literally every business could afford to benefit from our service.
Why choose us?
ViralQR will provide services for marketing, advertising, catering, retail, and the like. The QR codes can be posted on fliers, packaging, merchandise, and banners, as well as to substitute for cash and cards in a restaurant or coffee shop. With QR codes integrated into your business, improve customer engagement and streamline operations.
Comprehensive Analytics
Subscribers of ViralQR receive detailed analytics and tracking tools in light of having a view of the core values of QR code performance. Our analytics dashboard shows aggregate views and unique views, as well as detailed information about each impression, including time, device, browser, and estimated location by city and country.
So, thank you for choosing ViralQR; we have an offer of nothing but the best in terms of QR code services to meet business diversity!
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
3. Names and ID’s of the Group Members
Names ID’s
Kazi Humayun Kabir 2013-3-80-020
Md. Zahidul Islam 2015-1-80-025
Ridwan Ahmed 2015-1-80-029
Md. Siddikur Rahman 2015-1-80-048
3
4. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
4
5. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
5
6. Nanomedicine
The vision that Richard Feynman shared in 1959 has now been made
possible. He said it would be interesting in surgery if we could swallow the
surgeon.
Nanomedicine involves cell-by-cell regenerative medicine
Important issues
Biocompatibility: Can these new materials and devices work within the body, or will
they be rejected?
Interfacing: Will the new biomaterials we develop work outside living things—
enabling them to be interfaced with electronics and machines in a way that we can
safely use?
6
7. Nanobiosensors
a biosensor is a measurement system for the detection of an analyte that
combines a biological component with a physicochemical detector and a
nanobiosensor is a biosensor that on the nano-scale size
Optical biosensors
Electrical biosensors
Electrochemical biosensors
Nanotube based biosensors and many more…
Surface plasmon resonance (SPR) biosensor was first demonstrated for
biosensing in 1983 by Liedberg et al.
7
8. Bionanotech: Medicine & Sensor
Bionanotechnology is an emerging branch of biology and nanomedicine
Why do we want medical ‘nano’-particles?
Their size enables them to interact directly with most biomolecules
Requires collaboration of experts from various fields
Molecular Plasmonic is the study of light interacting with nanostructured
materials that can support a surface plasmon resonance excitation
Sensing and treatment of disease using plasmonic effect.
8
9. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
9
10. Molecular Plasmonics
The interaction between confined
electromagnetic (EM) effects and nearby
molecules has led to the emerging field
known as molecular plasmonics.
Using plasmonics effects we are capable
of
Sensing,
Spectral analysis,
Imaging,
Delivery,
Manipulation and
Heating of molecules, biomolecules or cells
Figure 01: Three types of molecule–plasmon
resonance couplings in molecule–metal
nanoparticle hybrids
10
11. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
11
12. Localized surface plasmon resonance (LSPR)
When an external light wave is incident on a
nanosphere, its electric field periodically
displaces the sphere’s electrons with respect to
the lattice. This results in oscillating electron
density – a localized surface plasmon resonance.
Can be used
In vivo application
In vitro application
Figure 02 : Basic
principles of localized
surface plasmon
resonance
12
13. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
13
14. Plasmon–molecule interactions
• Three types of molecule–
plasmon interactions:
I. Optical,
II. Mechanical and
III. Thermal
Ref: Zheng et al. Molecular plasmonics for biology and nanomedicine
Figure 03: Schematic summarizing and
structuring biological and nanomedical
applications of molecular plasmonics.
14
15. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
15
16. Application using Optical Effect
(i) Nanobiosensors based on LSPR modulation
A wide range (from UV to mid-infrared) of LSPR
wavelengths are obtained with metal
nanoparticles of various shapes and sizes
LSPR peak wavelength, intensity and/or bandwidth
can be modulated by molecular adsorption,
desorption or even conformational changes that
induce variations in the refractive index Figure 04: Localized surface plasmon
resonance range of metal nanoparticles
of different shapes
16
17. Application using Optical Effect (Cont…)
(i) Nanosensors based on LSPR
modulation
detecting molecules, biomolecules
and cellular signaling
A significant milestone for LSPR
nanosensors is to reach the single-
molecule detection limit
One of the major challenges for
LSPR based nanosensors is to
identify unknown molecules
Figure 6. Three types of molecule–plasmon resonance
couplings in molecule–metal nanoparticle hybrids
17
18. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
18
19. Application using Optical Effect (Cont…)
(ii) Surface-enhanced Raman
spectroscopy (SERS)
In Raman scattering, photons are scattered
inelastically, either losing energy or gaining
energy equal to the molecular vibrations
of the probed material.
SERS studies molecular structures,
dynamics, and various biological processes
detecting transformational and structural
changes in functional proteins and other
biomolecules
Figure 06: Surface-enhanced Raman spectroscopy.
(A) Schematic sample geometry for nanoparticle-
based SERS. (B) Raman spectrum of p-
mercaptoaniline collected with no nanoshells (blue)
and SERS spectra with nanoshells (red).
19
20. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
20
21. Application using Optical Effect (Cont…)
(iii) Plasmonic nanoscopy & imaging-
Optical imaging of nanoscale object exhibits challenges because of the
diffraction limitation of light
Near-field scanning optical microscopy (NSOM), plasmonic nanoscopy is
capable of nanoscale biological and medical imaging with-
high signal-to-noise ratio,
high spatial and temporal resolution and
low illumination power
Resolution up to 5 nm
21
22. Examples
Based on plasmon resonance energy transfer spectroscopy, real-time
production of cytochrome c in living HepG2 cells has been imaged.
Zheng et al. successfully applied SERS to study the reversible
photoswitching of isolated azobenzene-functionalized molecules
inserted in self-assembled monolayers .
Estrada and Gratton achieved a high-resolution 3D image of biological
fibers such as collagen and actin filaments by moving a single Au
nanoparticle along the fibers with near-infrared (NIR) femtosecond
pulses and measuring its trajectory
22
23. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
23
24. Application Using Thermal Effect
(i) Photothermal therapy
Plasmon-enhanced photothermal effects in
metal nanoparticles successfully
demonstrated for cancer therapy
laser excitation is used to kill tumor cells
selectively (schema right)
High EM energy density surrounding
nanoparticles is converted into thermal
energy that heats the metal nanoparticles
locally.
the particles are in or near the cancer cells,
and causes the cells to reach a temperature
approximately 15–20°C above physiological
temperature, high enough to induce
apoptosis .
Figure 07: Plasmonic photothermal therapy.
Schematic of Au nanoparticles adsorbed selectively
on tumors
24
25. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
25
26. Application Using Thermal Effect (Cont…)
(ii) Smart nanocarriers
Metal nanoparticles that use plasmon-
enhanced photothermal effects to release drug
molecules that were conjugated to their
surfaces have shown great promise
Because of their large surface-to-volume ratios,
nanoparticles are ideal carriers of
oligonucleotides such as ssDNA, siRNA and
plasmid DNA
26
27. Examples
Figure 08: Plasmonic gene therapy.
(A) Concept of gene release by
oligonucleotides on plasmonic
carriers with optical switch
activation. (B) Left: tunable metal
nanorod carriers based on different
aspect ratios. Middle: scanning
electron microscopy image of
nanorod with an aspect ratio
(length/diameter) of 3.5. Right:
axisymmetric FEMLAB simulation
demonstrating localized heat
distribution at the nanorod surface
at steady state.
Plasmonic Gene Therapy
27
28. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
28
29. Applications based on mechanical effects
(i) Plasmonic tweezers-
Plasmonic tweezers able to capture, trap stably and
manipulate single-molecules/biomolecules with
nanoscale precision
Transfer photon momentum to a
microparticle/nanoparticle, which experiences two
optical forces –
1. a scattering force and
2. a gradient force
These two forces allow plasmonic tweezers to operate
at low power with reduced optical inference or damage
to biomolecules and cells
Figure 09: Plasmonic tweezers (A &
B) The optical trapping of 200-nm
beads near the substrate without and
with nanodot pairs, respectively
29
30. Outline:
Molecular plasmonics for biology and nanomedicine
• Nanobiotech: Nanomedicine & Nanobiosensors
• Molecular plasmonics
• Localized surface plasmon resonance (LSPR)
Plasmon–molecule interactions
Three major applications
(1) Optical Effect
(i) Biosensors based on LSPR modulation
(ii) Surface-enhanced Raman spectroscopy (SERS)
(iii) Plasmonic nanoscopy & imaging
(2) Thermal Effect
(i) Photothermal therapy
(ii) Smart nanocarriers
(3) Mechanical Effect
(i) Plasmonic tweezers
• Future perspective
30
31. Future perspective
• Tremendous opportunities for sensing, imaging, manipulating,
delivering and smoldering biological molecules
• Can potentially integrate sensing, spectral analysis, molecular
manipulation, drug delivery, gene switches and photothermal therapy
onto the same nanoparticle platform.
• Will require strong collaboration between experts in many different
fields such as physics, Nanomedicine engineering, chemistry, biology
and pharmacology
31