Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: K1.00030 : Microstructure and Transport Studies of Functionalized Graphene
Author:
The microstructure and transport studies of fuctionalized
graphene are
reported. These studies reveal that the minimum conductivity is
sample
dependent and within the range (2-12)e$^{2}$/h independent of
gate voltage.
The variation of the minimum conductivity is attributed to sample
impurities, apparent in Atomic Force Microscopy and Raman
Spectroscopy. The
Raman peaks are in general consistent with graphene, but show
shifts in the
G and 2D peaks. These shifts are associated with strain and
doping. The
dependence of the current (I) on the bias voltage (V$_{SD})$ is
linear for
most samples. The current dependence on gate voltage (V$_{g
})$curves show
asymmetric behavior, showing the imbalance between the hole and
electron
carriers. A 16 A deposition of Fe leads to a significant
modification in the
transport properties due mostly the formation of iron oxide. The
AFM clearly
shows the formation of Fe clusters.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.30
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