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XPS evidence for molecular charge-transfer doping of graphene

Choudhury, Debraj and Das, Barun and Sarma, DD and Rao, CNR (2010) XPS evidence for molecular charge-transfer doping of graphene. In: Chemical Physics Letters, 497 (1-3). pp. 66-69.

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Official URL: http://dx.doi.org/10.1016/j.cplett.2010.07.089

Abstract

By employing X-ray photoelectron spectroscopy (XPS), we have been able to establish the occurrence of charge-transfer doping in few-layer graphene covered with electron acceptor (TCNE) and donor (TTF) molecules. We have performed quantitative estimates of the extent of charge transfer in these complexes and elucidated the origin of unusual shifts of their Raman G-bands and explained the differences in the dependence of conductivity on n- and p-doping. The study unravels the cause of the apparent difference between the charge-transfer doping and electrochemical doping. (C) 2010 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 27 Sep 2010 11:27
Last Modified: 27 Sep 2010 11:27
URI: http://eprints.iisc.ernet.in/id/eprint/32481

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