Surface Structures and Adsorption States of Self-Assembled Monolayers Formed by Various COOH-Terminated Alkanethiols on Au(111)
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概要
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Surface structures and adsorption states of self-assembled monolayers (SAMs) formed by COOH-terminated alkanethiols (ATs) with different alkyl chain lengths were examined by scanning tunneling microscopy (STM), contact angle measurement, and X-ray photoelectron spectroscopy (XPS). STM imaging reveals that COOH-terminated ATs with longer alkyl chains [HS(CH2)nCOOH, $n\geq 7$] can easily form well-ordered SAMs, while COOH-terminated ATs with shorter alkyl chains hardly form ordered SAMs [HS(CH2)nCOOH, $n\leq 5$]. From contact angle and XPS measurements, however, we found that the most surface characteristics, such as surface wettability as well as the adsorption state and the amount of adsorbed molecules, are independent of alkyl chain length. In this study, we elucidate that the intermolecular interaction between alkyl chains is a very important factor in obtaining two-dimensional well-ordered COOH-terminated SAMs.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-01-15
著者
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Hara Masahiko
Department of Cardiology, Osaka Rosai Hospital
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KONNO Kaoru
Department of Electronic Chemistry, Tokyo Institute of Technology
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Noh Jaegeun
Advanced Nanomaterials Laboratory Department Of Chemistry Hanyang University
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Ito Eisuke
Local Spatio-temporal Function Frontier Research System The Institute Of Physical And Chemical Resar
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Noh Jaegeun
Advanced Nanomaterials Laboratory, Department of Chemistry, Hanyang University, 17 Haengdang-dong, Seoungdong-gu, Seoul 133-791, Korea
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Hara Masahiko
Department of Electronic Chemistry, Interdisciplinary Graduate School of Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
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Konno Kaoru
Department of Electronic Chemistry, Interdisciplinary Graduate School of Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
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