物理化学学报 >> 2008, Vol. 24 >> Issue (03): 443-447.doi: 10.3866/PKU.WHXB20080316

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正十八烷醇在HOPG上形成自组装膜的吸附特性

钱丽萍; 邓文礼   

  1. 华南理工大学材料科学与工程学院, 广州 510640
  • 收稿日期:2007-10-09 修回日期:2007-12-13 发布日期:2008-03-10
  • 通讯作者: 邓文礼 E-mail:wldeng@scut.edu.cn

Adsorption Characteristics of Self-assembled 1-Octadecanol Layer on HOPG

QIAN Li-Ping; DENG Wen-Li   

  1. College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
  • Received:2007-10-09 Revised:2007-12-13 Published:2008-03-10
  • Contact: DENG Wen-Li E-mail:wldeng@scut.edu.cn

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摘要： 研究了正十八烷醇在高定向热解石墨(HOPG)上形成自组装膜的吸附特性, 正十八烷醇在室温下从溶液中吸附至HOPG上形成整齐定向排列的单层自组装膜. 通过扫描隧道显微镜(STM)、接触角测量和X射线光电子能谱(XPS)分析了正十八烷醇单层自组装膜在HOPG上的结构. 实验结果表明, 正十八烷醇自组装膜在基底上成平铺或直立形态, 由于分子在基底上覆盖程度的不同, 会导致它在基底上排列的方式有所不同.

关键词: 高定向热解石墨, 单分子自组装膜, 扫描隧道显微镜, 接触角, X射线光电子能谱

Abstract: Long-chain alkanol, 1-C18H37OH, adsorbed from solution onto highly oriented pyrolytic graphite (HOPG) and formed ordered, oriented monolayer films at room temperature in air. The formation and structure of 1-octadecanol self-assembledmonolayers (SAMs) on HOPGwere examined using scanning tunneling microscopy (STM), contact angle measurement, and X-ray photoelectron spectroscopy (XPS). Our experimental results indicated that 1-octadecanol SAMs grew in domains, with molecules arranged either horizontally or vertically on the substrate. Moreover, the permutation means of the molecule showed relevance to the surface coverage of 1-octadecanol SAMs on the HOPG.

Key words: HOPG, SAMs, STM, Contact angle, XPS