Jpn. J. Appl. Phys. 35 (1996) pp. 234-241  |Next Article|  |Table of Contents|
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Observation of Molecular Layers in (2-(4,5-bis(thiomethyl)-1,3-dithiol-2-ylidene)-5- (4,5-ethylenedithio-1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene) (TMET-TTP) Single Crystals by Means of Scanning Tunneling Microscopy

Teruo Takahashi, Takehiko Mori, Ken Ishikawa, Hideo Takezoe, Atsuo Fukuda, Yohji Misaki¹ and Tokio Yamabe¹

(Received September 21, 1995; accepted for publication October 30, 1995)

Scanning tunneling microscope (STM) observation has been made on single crystals of (TMET-TTP) _xA (TMET-TTP: 2-(4,5-bis(thiomethyl)-1,3-dithiol-2-ylidene)-5-(4,5-ethylenedithio-1,3-dithiol-2-ylidene)-1,3,4,6-
tetrathiapentalene), where A is PF₆, ReO₄, AuI₂ or ClO₄. The STM images with molecular resolution were observed in the conducting bc-plane, and were in accord with the results of X-ray observation. The S atoms in the thiomethyl groups are concluded to be responsible for the bright spots. The structural distortion in the ClO₄ salt as indicated by X-ray analysis was observed as domain structures of about 100 nm×100 nm area, though direct observation of different molecular alignments due to different space groups could not be made.

URL: http://jjap.jsap.jp/link?JJAP/35/234/
DOI: 10.1143/JJAP.35.234

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