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Graphene ppt
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- 8. European Union grantedin 1 billion euro to Chalmers University (Sweden) in 2013. Fact that it is currently one of the most researched material in the world Companies around the world urges to invest in this material. Just for discovering of it from Scotch Tape –Andre Gein & Konstantin Novoselov won Nobel Prize. Researchers around the world, race in for R&D for this material Patents around the world Samsung -149 Chinese entities -2,204 US entities -1,754 South Korean entities -1,160 United Kingdom entities -54
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- 10. Insight Graphene is asubstance composed of pure carbon, with atoms arranged in a regular hexagonal pattern similar to graphite, but in a one atom thick sheet. Or Flat monolayer of carbon atoms tightly packed into a two dimensional honeycomb lattice or Isolated Single Layer of Graphite
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- 12. NOBEL PRIZE WINNERS •Andre Geim and Konstantin Novoselov
- 13. Discovery… in 2003 They discoveredthin graphene flakes on the scotch tape, While cleaning a block of graphite. Keeping in mind the graphite's interatomic weak Van der Walls forces.
- 14. Isolation 1. Stick atape on the block of graphite 2. Remove Tape slowly, continue micro-elevation till more thinner fragments are obtained 3. Hunt under optical microscope for individual atomic planes • Favorite production technique for researchers.
- 15. Mechanical Properties • StrongestMaterial till date • Young's Modulus - 1 TPa ( Steel 0.2 Tpa) • 4 x stronger than diamond • No crystal boundaries • Pure Single layer sheet • Specific Weight - 0.77 mg / sq.m • Flexible - 340 - 600 N/m
- 17. Thermal & OpticalProperties • Thermal Conductivity - 5000 W/m.K • (Diamond 1200W/m.k) • Transparent in nature • 98% visual transmission rate, absorbs 2.3% white light • Thinnest 0.335 nm
- 18. Electrical Properties • Highelectrical conductivity 5000 W/mK. • Zero Gap conductivity • Resistivity 10-6 Ωcm • Charge carriers behave massless • Little Scattering • High mobility
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- 20. Integrated Circuits • Highmobility of charge can be integral in IC • Fast processing • Replaces Silicon
- 21. Distillation • It allowsonly water to pass through it. • Making ideal for purification process. Eradication of Water scarcity • Desalination
- 22. Gas Sensors • Candetect effect of a single molecule associating with graphene • Effects the electric properties with addition of any foreign atom
- 23. Transistors • More Efficientthan silicon transistors • Can be easily controlled by electric field • Can run at higher frequency • Increase speed of Circuits
- 24. Ultra-Capacitor • High surfaceto mass ratio • Two sheet of graphene with electrolyte in between • May replace batteries • High recharge rate and slow discharge • Long life
- 25. Bionic Devices • Noncorrosive • Biodegradable • High conductivity • Non toxic compared to conventional electrode used in bionic device
- 26. Protective Coating • Itis resistant to acids, alkalis etc. • Being impermeable • Coating of containers, Jars etc • Paints for car body, steel structure
- 27. Solar Cell • Itis super capacitor • With high recharge rate and a normal discharge rate
- 28. Flexible Mobilephone • Itcan be used to make flexible LED screen that can be used in mobile phones.
- 29. Obstacles • Conventional productionmethod still in search • Cost $100,000,000/cm2 2008 $100/cm2 2009 • Availability of low Quality • No band Gap
- 30. Conclusion You lost ur phone again!!No worries buy a new!
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