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Thursday, December 27, 2012

Cutting graphene using atomic force microscope

In a recent study, atomic force microscope is used to cut the graphene. Cutting forces are also measured with higher single cutting force along armchair direction than zig-zag.

http://apl.aip.org/resource/1/applab/v101/i21/p213101_s1?track=APLDEC12

Growth of monolayer Yttria on Graphene !

Researchers have successfully deposited a monolayer of Yttria- a high k dielectric- on graphene under high vacuum conditions. This provides a significant leap for integrating graphene in device architectures.

http://www.nature.com/nnano/journal/v8/n1/full/nnano.2012.217.html?WT.ec_id=NNANO-201301

Sunday, December 23, 2012

Electron energy loss spectroscopy helps in probing single Si atom dopant in graphene

A combination of scanning electron micsroscope (SEM), electron energy loss spectroscopy (EELS) and ab-initio calculations reveal the bonding and electronic structure of single Si atom dopant in graphene.
http://pubs.acs.org/doi/abs/10.1021/nl304187e


Tuesday, December 18, 2012

Graphene floats on SiC !

Epitaxial graphene grown on SiC has excellent quality in terms of mobility and is a candidate for microelectronics industry. However, graphene's interaction with SiC disturbs most of the properties. In a recent ACS Nano report, researchers have used oxygen as an intercalant to lift graphene from SiC and opens up ways for  further applications.

http://pubs.acs.org/doi/abs/10.1021/nn302729j

Thursday, December 13, 2012

Trilayer graphene as a versatile platform for electron optics and pseudospintronics

Not only single layer graphene rather multilayer graphene has also great promises for nanotechnology. In recent experiments, trilayer graphene is demonstrated as a potential candidate for pseudospintronics and electron optics.

http://www.nature.com/ncomms/journal/v3/n12/full/ncomms2243.html

micro-wave induced electrical response leads to spin resonance in epitaxial graphene

Graphene is strongly known for its exotic electronic properties. However, spin properties of graphene are also vitally important for new spintronics based devices. A recent report published in Nature reveals hole spin resonance and zero-field psuedo splitting in epitaxial graphene photoexcited by microwaves.

http://www.nature.com/ncomms/journal/v3/n8/full/ncomms1986.html