Journal
SYNTHETIC METALS
Volume 159, Issue 9-10, Pages 765-768Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2008.12.016
Keywords
Porphyrin; Scanning tunneling microscopy; Molecular array; Two-dimensional pattern; Information density
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Scanning tunneling microscopic (STM) observation of an array of 5,10,15,20-tetrakis(3,5-di-tert-butyl-4-hydroxyphenyl)porphyrin molecules deposited on a Au(111) surface revealed dark and bright spots within the regular two-dimensional pattern, which are due to conformational diversity of the adsorbed molecules caused by distortion of the porphyrin core. With this structure, two-digit information can be input with ca. 2-nm interval, which would correspond to an information density of 25 terabit/cm(2) if exploited in a memory device. (C) 2009 Elsevier B.V. All rights reserved.
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