Ballistic Property of Graphene helps Create New Electronic Devices

Scientists Making Use of Ballistic Property of Graphene to Create New Electronic

Scientists are endeavoring to create novel type of electronic devices based on graphene's ballistic property. The property states that graphene has the unique ability to smoothly carry tens or hundreds of electrons along the edges of the material without causing any resistance at room temperature.

Graphene nanoribbons act like optical wave guides to transfer electrons and the electrical resistance of which changes in discrete steps following quantum mechanical principles. But, this does not happens with other conductors like copper, the resistance of which increases as electrons travels along the length of the material.

After analyzing ballistic properties of graphene in cylindrical carbon nanotubes, researchers found 10 times increase in conductance of graphene. They measured ballistic properties in 40-nanometer wide graphene nanoribbons grown on the edges of three dimensional structures embedded into silicon carbide wafers.

For the past 10 years, researchers have been trying their level best to create graphene based devices, but were failing to attain desired electronic band-gap needed for such devices to operate.

Walt de Heer, a Regent's professor in the School of Physics at the Georgia Institute of Technology, said that resistance of any material does not depend on temperature, but on amount of current flowing through it.

He cited an example and said that touching nanoribbons of graphene with one probe increases resistance by two times and increases with increase in number of probes.

In the novel research, researchers firstly deposited layer of nanoribbons on silicon carbon wafers and then used microelectronics fabrication techniques to scratch patterns on them. Later on, the silicon wafers were heated to about 1000 degrees Celsius, resulting in extraction of silicon material along the edges. Thus, allowing smooth transfer of electrons through the material.

Manufacturing of graphene based devices was started for first time by Georgia Tech researchers in 2001 and they filed for patent in 2003.

User login

You May Have Missed...

UK junior doctors conclude first strike
Thu, 01/14/2016 - 03:04

The junior doctors in the United Kingdom have concluded their first industrial action that went on for 24 hours amid signs that an agreement might...

Nigeria Update

Fresh Polio Cases lead to WHO Travel Restrictions on Pakistan and Syria
Tue, 05/06/2014 - 00:45

World Health Organization has slapped international travel restrictions on Pakistan, Cameroon...

Economy Watch

US Import Prices decline in April
Thu, 05/14/2015 - 01:13

For a straight 10th month, US import prices declined in April. The decline could be due to the...

REM Google reports rise in Advertising Revenues

Health Tonight

Healthcare workers find bird flu virus in Dunfermline
Tue, 01/12/2016 - 03:03

Health experts have confirmed that they have found a bird flu strain at a local farm located in...

Science Tonight

NASA Observatory finds distant super massive black hole
NASA Observatory finds distant super massive black hole
Thu, 01/07/2016 - 02:57

American space agency, NASA has found a super massive black hole about a whopping 26 million...

Video shows lion being rescued off Gujarat coast

UK News

Sheffield GP facility is inadequate, says inspectors
Wed, 01/13/2016 - 03:25

A team of inspectors have said categorised a Sheffield GP surgery as inadequate and said that it...


Sat, 01/17/2015 - 06:04

Aetna inc., health care company, on Friday announced that it has signed a deal with Gilead...

US News

First Ever Bee-Map Reveals Surprising Data on Wild-Bees
First Ever Bee-Map Reveals Surprising Data on Wild-Bees
Mon, 12/28/2015 - 09:26

A recent map created by University of Vermont’s Gund Institute for Ecological Economics revealed...

Medical-grade wearables might soon be available in the market

Technology Tonight

NDRF ties up ISRO unitfor valuable satellite data
Thu, 10/29/2015 - 13:59

The National Disaster Response Force (NDRF) has announced that it has entered into a partnership...