Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (03): 443-447.doi: 10.3866/PKU.WHXB20080316

• ARTICLE • Previous Articles     Next Articles

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

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