This seminar covered various types of nanogenerators including piezoelectric, triboelectric, and pyroelectric nanogenerators. Piezoelectric nanogenerators convert mechanical energy to electricity using materials like ZnO nanowires. Triboelectric nanogenerators use friction-induced static electricity to power devices. Pyroelectric nanogenerators harness temperature fluctuations using materials with electric dipoles that change with temperature. A hybrid generator was also discussed that combines solar cells and piezoelectric nanowires to harvest both light and vibration. More advanced materials like barium titanate and graphene composites were also proposed to improve nanogenerator performance and enable applications like self-powering temperature
A nanogeneratoris a nanoscale device capable of generating electric current, or electromagnetic fields for the use in various fields. With these nanogenerators, the mechanical energy can be harnessed to recharge electronic gadgets. Zhong LinWang, professor in Georgia Institute of Technology invented this technology. The nanogenerator he made could produce 4W per cc of the nanowire. The working principle of nanogenerator is the PIEZOELECTRIC EFFECT; a phenomenon displayed by certain materials where mechanical stress is converted to electric current. This effect is closely related to a change of polarization density within the material’s volume. If the material is not short circuited, the applied stress induces a voltage across it.Thenanogenerator is made up of zinc oxide wires. These nanowires being piezoelectric, produces a small electrical pulse when subjected to mechanical stress like body movements or even light breeze.
Nanogenerators are those generators which converts mechanical energy into electrical energy based on piezoelectric effect , triboelectric effect and pyroelectric effect.
Nanogenerator: Electricity with a pinch of your fingerAKANKSHA SINGHAL
To meet rising energy demand, scientists are continuously working on coming up with new sources of electricity generation. Professor Z.L.Wang made one such successful attempt by developing a device that is able to convert mechanical/thermal energy (which otherwise goes waste) into useful electrical energy with the help of piezoelectric effect. This device is called Nanogenerator. The applications,classification, fabrication techniques of Nanogenerator etc are discussed in the presentation.
nano technology+piezo electric transducer(energy harvesting devices)= "nano generators"
nano technology, nano systems ,
it harvest energy from environment and converts into electrical energy.
What is energy harvesting?
What are some of its applications?
Can we make that at home?
#WikiCourses
https://wikicourses.wikispaces.com/XTopic+Energy+Harvesting
A nanogeneratoris a nanoscale device capable of generating electric current, or electromagnetic fields for the use in various fields. With these nanogenerators, the mechanical energy can be harnessed to recharge electronic gadgets. Zhong LinWang, professor in Georgia Institute of Technology invented this technology. The nanogenerator he made could produce 4W per cc of the nanowire. The working principle of nanogenerator is the PIEZOELECTRIC EFFECT; a phenomenon displayed by certain materials where mechanical stress is converted to electric current. This effect is closely related to a change of polarization density within the material’s volume. If the material is not short circuited, the applied stress induces a voltage across it.Thenanogenerator is made up of zinc oxide wires. These nanowires being piezoelectric, produces a small electrical pulse when subjected to mechanical stress like body movements or even light breeze.
Nanogenerators are those generators which converts mechanical energy into electrical energy based on piezoelectric effect , triboelectric effect and pyroelectric effect.
Nanogenerator: Electricity with a pinch of your fingerAKANKSHA SINGHAL
To meet rising energy demand, scientists are continuously working on coming up with new sources of electricity generation. Professor Z.L.Wang made one such successful attempt by developing a device that is able to convert mechanical/thermal energy (which otherwise goes waste) into useful electrical energy with the help of piezoelectric effect. This device is called Nanogenerator. The applications,classification, fabrication techniques of Nanogenerator etc are discussed in the presentation.
nano technology+piezo electric transducer(energy harvesting devices)= "nano generators"
nano technology, nano systems ,
it harvest energy from environment and converts into electrical energy.
What is energy harvesting?
What are some of its applications?
Can we make that at home?
#WikiCourses
https://wikicourses.wikispaces.com/XTopic+Energy+Harvesting
This presentation introduces the concept, working principle, and applications of triboelectric nanogenerators (TENGs), which are devices that can harvest mechanical energy from various sources and convert it into electricity. The presentation consists of the following sections:
1. Introduction to TENGs
2. Triboelectric Effect
3. Triboelectric Series
4. Triboelectric Nanogenerator - Working
5. Different Modes In TENG
6. Applications
7. Advantages
8. Disadvantages
9. Future Prospects
The presentation concludes with a summary of the main points and a list of references for further reading.
Its an simple slide through which one could know about energy harvesting through piezo electricity and their future scope.It details about the profit of laying piezo roads through an example.
In this presentation, it proposes efficient method of storing energy by the use of piezoceramic. It is very reliable to use
piezo ceramic for generating electrical energy which can be used for powering any portable devices. The basic concept
of piezo ceramic is that the mechanical strain applied on to the ceramic such as bimorph or unimorph piezo converts it
into electrical energy. In the present day scenerio, wherein there is great demand for energy, this idea of piezoelectric
concept works well.
A supercapacitor or ultra capacitor is an electrochemical capacitor that has an unusually high energy density when compared to common capacitors. They are of particular interest in automotive applications for hybrid vehicles and as supplementary storage for battery electric vehicles.
Piezo electric based harvesting is a kind of renewable energy which senses the mechanical vibration into electrical output. In this slide we have study the feasibility of a piezoelectric energy harvester capable to power up low power electronic and electrical circuit.
This presentation introduces the concept, working principle, and applications of triboelectric nanogenerators (TENGs), which are devices that can harvest mechanical energy from various sources and convert it into electricity. The presentation consists of the following sections:
1. Introduction to TENGs
2. Triboelectric Effect
3. Triboelectric Series
4. Triboelectric Nanogenerator - Working
5. Different Modes In TENG
6. Applications
7. Advantages
8. Disadvantages
9. Future Prospects
The presentation concludes with a summary of the main points and a list of references for further reading.
Its an simple slide through which one could know about energy harvesting through piezo electricity and their future scope.It details about the profit of laying piezo roads through an example.
In this presentation, it proposes efficient method of storing energy by the use of piezoceramic. It is very reliable to use
piezo ceramic for generating electrical energy which can be used for powering any portable devices. The basic concept
of piezo ceramic is that the mechanical strain applied on to the ceramic such as bimorph or unimorph piezo converts it
into electrical energy. In the present day scenerio, wherein there is great demand for energy, this idea of piezoelectric
concept works well.
A supercapacitor or ultra capacitor is an electrochemical capacitor that has an unusually high energy density when compared to common capacitors. They are of particular interest in automotive applications for hybrid vehicles and as supplementary storage for battery electric vehicles.
Piezo electric based harvesting is a kind of renewable energy which senses the mechanical vibration into electrical output. In this slide we have study the feasibility of a piezoelectric energy harvester capable to power up low power electronic and electrical circuit.
An organic solar cell or plastic solar cell is a type of photovoltaic that uses organic electronics, a branch of electronics that deals with conductive organic polymers or small organic molecules, for light absorption and charge transport to produce electricity from sunlight by the photovoltaic effect. Most organic photovoltaic cells are polymer solar cells.
boosting energy of solar panel using heat pipesIJCMESJOURNAL
A novel micro heat pipe array was used in solar panel cooling system, both under air-cooled and water cooled mediums, under natural convection. As compared with a ordinary solar panel (without heat pipe arrangement). The result had considerable variation in the efficiency of the energy output, it improved with the help of heat pipe installation. Therefore using a heat pipe gradually improved the efficiency by reducing the heat by cooling the system.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
This file contains full description of all parts of microwave and all kind of information related to microwave oven that could help you in technical terms.
A Technology Review of Electricity Generation from Nuclear Fusion Reaction in...IJMER
In this review paper, we have tried to revisit the basic concept of nuclear fusion and the recent
thrust that has been witnessed in the recent times towards power generation from it . In fusion we get the
energy when two atoms fused together to form one atoms. With current technology the reaction most
readily feasible is between the nuclei of the deuterium (D) and tritium (T). Each D-T releases 17.6 MeV of
energy. The use of nuclear fusion plant will substantially will reduce the environmental impacts of
increasing world electricity demands. Fusion power offers the prospect of an almost inexhaustible source of
energy for future generation but it also presents so far insurmountable scientific and engineering
challenges.
This kind of Van de Graaff generator is made up of:
• A motor
• Two rollers
• A belt
• Two brush assemblies
• An output terminal (usually a metal or aluminum sphere)
The strong negative charge from the roller now begins to do two things:
1. It repels the electrons near the tips of the lower brush assembly.
2. It begins to strip nearby air molecules of their electrons.
Applications:
1. It is used to generate x-rays, which is widely used in medicine field.
2. It is used in atom smasher’s, which is used in research purposes.
3. It found applications in physics, medicine, and astro physics.
The terms atomic battery, nuclear battery, tritium battery and radioisotope generator are used to describe a device which uses energy from the decay of a radioactive isotope to generate electricity. Like nuclear reactors they generate electricity from atomic energy, but differ in that they do not use a chain reaction.
Similar to Nanogenerators, Producing Energy out of waste energy-The Future (20)
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Nanogenerators, Producing Energy out of waste energy-The Future
1. Seminar on Nanogenerators
Presented by :
Siddhant H Pathak
Roll No. - 20
M.Sc. – 3rd Sem.
Department of :
Materials Science
2. Index
Introduction
3 basic types of nanogenerators
Hybrid Generators
Advance Material for nanogenerators
Nanosized Hydrogen Generator
References
3. Introduction
Renewable energy technologies consists of two distinct processes:
Energy generation (using sources such as solar, wind, tidal etc.)
energy storage (batteries, fuel cells).
Accomplishment of these two processes
1) Process converting the original form of energy to electricity.
2) Converting electricity to chemical energy(for storage).
For the first time a device has been made that converts mechanical
energy(any vibration) directly to chemical energy bypassing the
intermediate step of electricity generation. The device hence acts
as a hybrid(generator-battery unit) or in other words, a self-charging
power cell.
4. For this the researchers started with a coin-type Li-ion
battery and replaced the polyethylene separator that
normally separates the two electrodes with PVDF
(Polyvinylidene difluoride) film
As a piezoelectric material, PVDF film generates a
charge when under an applied stress.
PVDF film causes positive Li ions to migrate from the
cathode to the anode in order to maintain a charge equilibrium across the battery.
this ion migration process charges the battery without the need for any external voltage source. The
battery is hence SELF-CHARGING
5. Nanogenerators
Nanogenerator is a device that converts ambient energy(sound, muscle
movement, heat, fluid flow etc) into electricity.
Nanogenerators are typically of three types -:
1) Piezoelectric nanogenerators
uses mechanical energy
2) Triboelectric nanogenerators
uses frictional energy
3) Pyroelectric nanogenerators
uses fluctuation in temperature
6. Piezoelectric nanogenerator
Electrode- Typically made of Si coated
with Pt to increase conductivity
ZnO nanowires have a diameter of 100 to
300 nm and produce 45mV on pulling
back and forth
7.
Working
Schottky contact must be formed between the counter electrode and the tip of the
nanowire since the ohmic contact will neutralize the electrical field generated at the
tip. In order to form an effective schottky contact, the electron affinity(Ea) must be
smaller than the work function(φ) of the the counter electrode. For the case
of ZnO nanowire with the electron affinity of 4.5 eV, Pt(φ=6.1eV) is a suitable metal
to construct the schottky contact. By constructing the schottky contact, the electrons
will pass to the counter electrode from the surface of the tip when the counter
electrode is in contact with the regions of the negative potential, whereas no current
will be generated when it is in contact with positive potential [Rectifier]
8. Triboelectric Generator
A device that takes advantage of static electricity to convert
movement—like a phone bouncing around in your pocket—
into enough power to charge a cell phone battery.
When thin films of PET plastic and a metal come into contact
with one another, they become charged. And a current flows
between them, which can be harnessed to charge a battery.
When the two surfaces are patterned with nanoscale structures,
their surface area is much greater, and so is the friction
between the materials—and the power they can produce.
A fingernail-sized square of this triboelectric nanomaterial can
produce eight milliwatts enough to run a pacemaker. A patch
that’s five by five centimeters can light up 600 LEDs at once, or
charge a lithium-ion battery that can then power a commercial
cell phone.
9. Principle: works on the basis of triboelectric effect. It is a type
of contact electrification in which
certain materials
become electrically charged after they come into contact with
another different material and are then separated (such as
through rubbing). The polarity and strength of the charges
produced differ according to the materials, surface roughness,
temperature and strain.
Mechanism
1) Vertical
Sliding
Mode
10. 2) Lateral Sliding Mode : By sliding friction, a periodic change in the contact area,
which creates a voltage drop for driving the flow of electrons.
Because of the large difference in the ability to attract electrons, the triboelectrification
will leave one surface with net positive charges and the other with net negative
charges with equal density.
Once the top plate with the positively-charged surface starts to slide outward, the in-plane
charge separation is initiated due to the decrease in contact surface area. The
separated charges will generate an electric field pointing from the right to the left
almost parallel to the plates, inducing a higher potential at the top electrode. This
potential difference will drive a current flow from the top electrode to the bottom
electrode .
11. Pyroelectric Effect
More than 50 percent of the energy generated by us goes to waste, much of it as heat
released to the environment by everything from computers to cars to long-distance
electric transmission lines. This heat can
be converted to electricity using something
called the pyroelectric effect
Harvesting thermoelectric energy relies on the Seebeck effect that utilizes a temp.
difference between two ends of the device for driving the diffusion of charge
carriers. Environment is spatially uniform without a temp. gradient and the Seebeck
effect can not be used to harvest thermal energy.
The mechanism is based on the
thermally induced random wobbling
of the electric dipole around its
equilibrium axis, the magnitude of
which increases with increasing temp.
12. When temp. increases the electric dipoles
oscillate within a larger degree of spread
around their respective aligning axes. Total
average spontaneous polarization is decreased
due to the spread of the oscillation angles and
the quantity of induced charges is reduced,
resulting in a flow of electrons.
If the nanogenerator is cooled instead of heated,
the spontaneous polarization will be enhanced
the amount of induced charges in the electrodes
will increase and the electrons will then flow in
an opposite direction.
Pyroelectric nanogenerator can be used as an
active temperature sensor, which can work
without a battery i.e utilizing the energy that it
produces [SELF-CHARGING TEMP. SENSOR]
13. Hybrid Nanogenerator
Now researchers have combined
a nanogenerator with a solar cell to
create an integrated mechanical- and
solar-energy-harvesting device. This
hybrid generator is the first of its
kind and might be used, for instance,
to power airplane sensors by
capturing sunlight as well as engine
vibrations for when solar energy isn’t
available
The top layer here consists of a thin-film solar cell embedded with dye-coated zinc
oxide nanowires. The large surface area of the nanowires boosts the device’s light
absorption
The solar cell and the nanogenerator are electrically connected by the silicon
substrate itself, which acts as both the anode of the solar cell and the cathode of the
nanogenerator
14. Advanced material for nanogenerator
So far, efforts to make
nanogenerators have focused on ZnO
nanowires. But barium titanate
(BaTiO3)could lead to better
generators because it shows a
stronger piezoelectric effect, Lab
experiments show that a barium-titanate
nanowire can generate
“16 times” as much electricity as a
ZnO nanowire from the same
amount of mechanical vibrations
High Sensitive accelerometer of BaTiO3
But zinc oxide has its own advantages.
It is nontoxic to biological systems making it better suited than barium titanate for
implantable devices. Also, it is easier to control zinc-oxide growth in order to fabricate
nanowire arrays compared to Barium Titanate
15. Nanosized Hydrogen Generator
Hydrogen is virtually everywhere on the planet, but is typically
bonded with other elements and must be separated (Like in H2O) to
produce free hydrogen. The process
available for this right now
consumes too much electricity and releases Co2(A green house gas).
N.H.G does not extract but make Hydrogen by combining an
electron and a proton
Principle:
It has been long known that some single-celled organisms use a protein
called bacteriorhodopsin (bR) to absorb sunlight and pump protons
through a membrane using the green end of sunlight.
At the same time electrons can be produced by combining these proteins
with titanium dioxide and platinum and then exposing them to
ultraviolet light.
Combining this we can literally manufacture Hydrogen(for fuel)
16. Problem:
Titanium dioxide only reacts in the presence of ultraviolet light, which makes
up a mere 4% of the total solar spectrum
Solution [Materials Science]
For this the researchers looked for a new material. The new material would
need enough surface area to move electrons across quickly and evenly and
boost the overall electron transfer efficiency.
The researchers also needed a platform on which biological components, like
bR, could survive(biologically inert) and connect with the titanium dioxide
catalyst: in short, a material like graphene.
Along with this Graphene is also super strong, super light, transparent and the
best conductor of electricity so far. Its very presence allows the other
components to self-assemble around it, which totally changes how the electrons
move throughout our system.
17.
18. References:
Phys.orgnews 20th september 2014
Wikipedia
Google images
Nanogenerators for self powered devices and
systems by Zhong Lin Wang, School of Materials
Science and Engineering Georgia Institute of
Technology, Atlanta GA USA(first edition, June
2011)
Technologyreview.com