A graphene based hot electron transistor

In a recent study published in Nano Letters, experimentalists have demonstrated DC functionality of graphene based hot electron transistor. Moreover, the device is integrated using fabrication steps which are compatible with Si technology. An on/off ratio exceeding 10E4 is reported for graphene based transistor.

The findings open doors for graphene device market.

http://pubs.acs.org/doi/abs/10.1021/nl304305x?mi=ya8wwg&af=R&pageSize=20&title=graphene

Hot carrier generation in graphene !

In a recent study, researchers have analyzed different pathways contributing to the ultrafast relaxation of photoexcited carriers in graphene using tetra-hertz pump spectroscopy. The results indicate that carrier-carrier scattering is the dominant mechanism leading to the generation of hot electrons in graphene. These hot carriers in turn can drive current in graphene enabling its high efficiency optoelectronic applications.

http://www.nature.com/nphys/journal/v9/n4/full/nphys2564.html?WT.ec_id=NPHYS-201304

Electron optics applications of graphene

Transverse magnetic focusing has been observed in graphene and is expected to open new application area of graphene in electron-optics. In a recent report published in Nature Physics, researchers have used ambipolar nature and ballistic transport properties of graphene to study the transverse magnetic focusing effect upto room temperature.

http://www.nature.com/nphys/journal/v9/n4/full/nphys2549.html?WT.ec_id=NPHYS-201304

Graphene used as a platform to observe atomic collapse

Researchers have imaged atomic collapse in Ca dimers placed on CVD graphene/BN stack using STM. This became possible because charge carriers in graphene behave as massless relativistic particles. 

http://www.sciencemag.org/content/early/2013/03/06/science.1234320.full

Graphene devices go for integration with Si- A new approach

The quest is on for integrating graphene with Si and is a dreamwork for nanoelectronics. In this direction, researchers have developed a new 'manufacturable process integration' (MPI) approach for fabricating graphene devices. The approach can be a significant milestone to enter in the era of nanoelectronics based on 2D materials.

http://www.sciencedirect.com/science/article/pii/S0038110113000658

New study unleashes photovoltaic potential of doped graphene

Optoelectronic properties of graphene have shown great promise in next generation photovoltaic devices and photodetectors. A recent study, published in Nature Physics, reveals the highly efficient conversion of light into free electron-hole pairs through tetrahertz probe measurements. The results are very promising and enable great future for highly efficient optoelectronic applications of graphene.

http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys2564.html

Just for new experimentalists :-)

It's a long time, I have blogged new results on graphene as I was bit busy. To give it a start, I am providing a link ( I know u can it from Google also..) where one can find excerpts from an interview (2010) with K. Novoselov. This is just to encourage students for doing experiments and implementing any idea they come across.
Just do it..

http://archive.sciencewatch.com/ana/st/graphene/09febSTGraNovo/