By,Koushi B.TVI ECA
OVERVIEW Let us know GRAPHENE
Structure
Properties
What makes Graphene different fromothers?
Applications
Potential applications
Challenges
Conclusion
So What is Graphene?World’s first 2D crystal.
Latest invented allotrope of Carbon.
Thinnest ever material in the world.
Obtained from simple and abundant form of carbon
Single layer hexagonal structure.
Konstantin Novoselow and Andre Geim ,Nobel prize for Physics in 2010.
Structure of GrapheneSheets of graphene are bonded by loose bond in graphite.
These bonds are broken and sheets are isolated to form graphene.
These isolated hexagonal sheets are Graphene.
PROPERTIESBreaking Strength 42N/m, 1000 times stronger than
steel.
Thinnest possible material.
High Electrical and Thermal conductivity.
Absorbs 2.3% of light falling on it.
Transparent, Elastic.
What makes Graphene different from others?Unique structure
All in one properties
Low cost
Abundant element
Simple fabrication techniques
Chemically inert
Thermal stability
APPLICATIONS Electrical Engineering• Can replace graphite in brushes of motors.• It can replace copper as conducting material.• When mixed with plastic can be used as conductor with higher
strength
Mechanical Engineering• In manufacturing process as manufacturing material.• As a composite material in machines and cars.• Air planes, space shuttles, satellites.
Electronics Engineering
Will replace or rejuvenate silicon and germanium as device material.
Conducting material on PCBs.
Single molecule sensors.
Touchscreens.
IBM in 2010, 1ST Graphene transistors.
Graphene Integrated Circuits.
Graphene chips.
POTENTIAL APPLICATIONSSolar cells
Graphene biodevices
Nano gaps in Graphene sheets may provide new technique for rapid DNA sequencing.
Transparent conducting electrodes.
Water desalination.
Graphene based sensors could sniff out dangerous molecules.
CHALLENGESUnlike silicon, graphene does not have an energy gap,
and therefore graphene cannot be swithched off resulting in a small on/off ratio.
Single sheet of graphene is hard to produce.
New fabrication methods has to be evolved for normal use in electronics.
CONCLUSIONGraphene is a new hope for electronic devices and could
replace or rejuvenate silicon based devices.
Successful prototypes include superconductors, flexible displays and ultra-capacitor.
It shall introduce new era of devices for electronics, space, bio-medical and energy harvesting.
Graphene devices might surround us very soon.
THANK YOU