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Insertion process and electrical conduction of conjugated molecules inn-alkanethiol self-assembled monolayers on Au(111)

Authors :
Hiroshi Tokumoto
Wataru Mizutani
Uichi Akiba
Masamichi Fujihira
Nami Choi
Takao Ishida
Source :
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 18:1437-1442
Publication Year :
2000
Publisher :
American Vacuum Society, 2000.

Abstract

We have investigated an insertion process of conjugated molecules, 4-biphenylmethanethiol (BP) and [1,1′:4′,1″-terphenyl]-4-methanethiol (TP) into preassembled n-alkanethiol self-assembled monolayers on Au(111) using scanning tunneling microscopy (STM). Ex situ STM observation revealed that the insertion process is dependent on an organic solvent in which the conjugated molecules dissolve. The insertion of conjugated molecules with three phenyl rings (TP) was faster than that with two phenyl rings (BP). By analyzing the STM images, the lower limits of resistances for single BP and TP molecules were obtained as 22±5 and 36±5 GΩ, respectively.

Details

ISSN :
15208559 and 07342101
Volume :
18
Database :
OpenAIRE
Journal :
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
Accession number :
edsair.doi...........e33c9b75066d54103fe28c220928c37a
Full Text :
https://doi.org/10.1116/1.582477