Nano generators 242
- 1. SAI SPURTHI INSTITUTE OF TECHNOLOGY (An ISO 9001:2011 Certified Institution & Accredited by NAAC-UGC) DEPARTMENT OF ELECTRICALAND ELECTRONICS ENGINEERING NANO GENERATOR TECHNICAL SEMINAR ON PRESENTED BY: V.RAMESH (12C51A0242) INCHARGE: A.GOPI M.TECH(PE)
- 2. Contents • Introduction • Piezo electric transducer(nanogenerator) • Inside a nanogenerator • Working principle • Types of nanogenerators • Sources which nanogenerator can exploit • Applications • Limitations
- 3. Introduction
- 4. Developers of Nanogenerators Dr. Zhong Lin (Z.L.) Wang and his colleagues at Georgia Institute of Technology, Georgia State, USA have made significant leaps in developing nanogenerators over the last decade.
- 5. Piezoelectric Transducer • Ability to create electrical potential when compressed, expanded or changed in shape (Mechanical energy to Electrical energy). • The voltage generated can be quiet high. • Made up of piezoelectric crystals like quartz and topaz. • Unaffected by external electromagnetic fields. • Can be used both as generators and actuators.
- 6. A Nano Scale Piezoelectric Transducer (Nanogenerator) • Harnesses the body's energy. • Made of Zinc Oxide (ZnO) wires called Nanowires. • Produces 45 millivolts whenever the zinc wire is pulled back and forth. • With simultaneous output from many nanowires, we can generate high power. • The wires have a diameter of 100 to 300 nm and length of about 10 to 100 micron.
- 7. Inside A Nanogenerator • Consists of an integrated circuit. • Components are made from ITO (Indium tin oxide) and a piezoelectric ceramic. • Nanowire bends and generates an electrical charge. • ITO electrode captures that charge. • Several electrodes capture power from millions of nanowires.
- 8. Inside A Nanogenerator • Piezoelectric effect creates an electrical field inside the nanostructure. • Relative displacement of cations with respect to anions in its crystalline structure. Potential distribution for a ZnO NW at a lateral bending force of 80 nanonewtons is shown.
- 9. How it works? • Working principle of Nanogenerator where an individual nanowire is subjected to the force exerted perpendicular to the growing direction of nanowire.
- 10. • The working principle of Nanogenerator will be explained for the force exerted perpendicular to the nanowire. • The piezoelectric effect will create the electrical field inside the nano structure; the stretched part with the positive strain will exhibit the positive electrical potential, whereas the compressed part with the negative strain will show the negative electrical potential.
- 13. Types of Nanogenerators * Nano composite Electrical Generators (NEG).3
- 14. 1. Vertical nanowire Integrated Nanogenerator (VING) • 3 parts : a. base electrode, b. vertical piezoelectric nanostructure, & c. counter electrode. • Nanowires grown from the base electrode to the counter electrode. • Counter electrode motion induces the deformation of the nanowire.
- 15. 2. Lateral nanowire Integrated Nanogenerator (LING) • 3 parts : a. base electrode, b. lateral piezoelectric nanostructure, & c. counter electrode. • Integrated on a flexible substrate. • Individual NW is subjected to high tensile strain. • Allows for amplification by series connection of units.
- 16. 3.Nanocomposite Electrical Generators (NEG) • It has a 3-main parts. a) metal plate electrodes, b) vertically grown piezoelectric nano structure, c) polymer matrix which fills in between in the piezoelectric nano structure. • It has a higher efficiency compared to original nanogenerator configuration
- 17. Sources which Nanogenerators can exploit • For Large scale applications (from wherever periodic kinetic energy exists) : 1. Wind, 2. Ocean Waves. • Small scale applications : 1. Tiny physical motion, 2. Inhalation of lung, 3. Heartbeat, 4. Muscle movement, i.e. Any kind of movement!!
- 18. Understanding from video • Self-powered Thin Film Nanogenerator by Finger
- 19. Applications • Powering conventional electronics : 1. Light Emitting Diode (LED), 2. Liquid Crystal Display (LCD), and 3. Laser Diode. • To power your personal gadgets and phones. • Self-powered nano/micro devices. • Smart Wearable Systems.
- 20. Applications • Smart Wearable Systems Power shoes A power shirt
- 21. Limitations • Uniformity of nano wires. • Life time.
- 22. THANK YOU