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Cited by 784

The DOI matches its Crossref record; 49 of the 49 references it cites were found in a registry or an index.

Atmospheric Oxygen Binding and Hole Doping in Deformed Graphene on a SiO2 Substrate

Open access
Ryu, Sunmin, Liu, Li, Berciaud, Stephane, Yu, Young-Jun, Liu, Haitao, Kim, Philip, Flynn, George W., Brus, Louis E.·2010·Nano Letters

Abstract

Using micro-Raman spectroscopy and scanning tunneling microscopy, we study the relationship between structural distortion and electrical hole doping of graphene on a silicon dioxide substrate. The observed upshift of the Raman G band represents charge doping and not compressive strain. Two independent factors control the doping: (1) the degree of graphene coupling to the substrate and (2) exposure to oxygen and moisture. Thermal annealing induces a pronounced structural distortion due to close coupling to SiO2 and activates the ability of diatomic oxygen to accept charge from graphene. Gas flow experiments show that dry oxygen reversibly dopes graphene; doping becomes stronger and more irreversible in the presence of moisture and over long periods of time. We propose that oxygen molecular anions are stabilized by water solvation and electrostatic binding to the silicon dioxide surface.

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Metadata

Authors
Ryu, S., Liu, L., Berciaud, S., Yu, Y.-J., Liu, H., Kim, P., Flynn, G. W., & Brus, L. E.
Venue
Nano Letters
Published
2010-11-11
Volume
10
Issue
12
Pages
4944-4951
ISSN
  • 1530-6984 (ISSN-L)
  • 1530-6992
OpenAlex
W1973235300
Cited by
784
References
49
FWCI
25.33
Type
journal article
Language
en
Open access
green

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