Graphene

Information about Graphene

Published on July 7, 2014

Author: BushraMustafa

Source: authorstream.com

Content

Graphene: Graphene By: Bushra Mustafa Electrical Department, UET, Peshawar, Pakistan. Introduction Background Construction Physical Properties Electrical & Electronic Properties Majestic Future Conclusion : Introduction Background Construction Physical Properties Electrical & Electronic Properties Majestic Future Conclusion Introduction: Introduction Graphene Allotropic form of carbon Single layer hexagonal structure World’s first 2D crystal Background: Background Discovered by Philip Wallace 1960’s: Was considered to be non-existent Thermodynamic instability Was fully observed in 2004 Andre Geiz & Konstantin Novoelov Nobel Prize 2010 Background: Background Construction: Construction Grown exfoliationally Obtained from abundant form of graphite loose bonds in graphite Scotch tape technique Physical Properties: Physical Properties Density of 0.77mg/ m 2 Strength of 42N/m 1000 times stronger than steel Bond length of 0.142nm Almost transparent Absorbs 2.3% of light High transparency in near infra-red regions Thinnest possible material Electrical & Electronic Properties: Electrical & Electronic Properties Different electronic structur e Acts as semiconductors High electrical conductivity Conductivity increased by use of electric field Conductivity 10 times greater than that of Cu High electron mobility at room temperature Least resistivity of 10 -6 Ω -cm Best known conductor till now Majestic Future: Majestic Future Graphene as electrodes High conductivity Low sheet resistance Stretchable, flexible & transparent e-devices T ransparency of graphene Gapless semiconductors Smaller Cheaper Majestic Future: Majestic Future Conclusion: Conclusion Due to its transparency and conductivity, Si based devices will be replaced Their fusions with semiconductors opening up new world of cheaper technology Successful prototypes including super conductor, ultra capacitors etc Graphene devices will surround us soon! Thanks: Thanks

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