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Scanning Tunneling Microscopy and Atomic Force Microscopy Investigation of Organic Tetracyanoquinodimethane Thin Films

Published online by Cambridge University Press:  31 January 2011

H. J. Gao ,
H. X. Zhang ,
Z. Q. Xue  and
S. J. Pang
H. J. Gao
Affiliation:
Department of Electronics, Peking University, Beijing 100871, China and Beijing Laboratory of Vacuum Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
H. X. Zhang
Affiliation:
Department of Electronics, Peking University, Beijing 100871, China and Beijing Laboratory of Vacuum Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
Z. Q. Xue
Affiliation:
Department of Electronics, Peking University, Beijing 100871, China and Beijing Laboratory of Vacuum Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
S. J. Pang*
Affiliation:
Department of Electronics, Peking University, Beijing 100871, China and Beijing Laboratory of Vacuum Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
*
a)Author to whom all correspondence should be addressed: Professor S. J. Pang, Beijing Laboratory of Vacuum Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China.
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Abstract

Scanning tunneling microscopy (STM) and atomic force microscopy (AFM) investigation of tetracyanoquinodimethane (TCNQ) and the related C60-TCNQ thin films is presented. Periodic molecular chains of the TCNQ on highly oriented pyrolytic graphite (HOPG) substrates were imaged, which demonstrated that the crystalline (001) plane was parallel to the substrate. For the C60-TCNQ thin films, we found that there were grains on the film surface. STM images within the grain revealed that the well-ordered rows and terraces, and the parallel rows in different grains were generally not in the same orientation. Moreover, the grain boundary was also observed. In addition, AFM was employed to modify the organic TCNQ film surface for the application of this type of materials to information recording and storage at the nanometer scale. The nanometer holes were successfully created on the TCNQ thin film by the AFM.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 8 , August 1997 , pp. 1942 - 1945
Copyright
Copyright © Materials Research Society 1997

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