正十八烷醇在HOPG上形成自组装膜的吸附特性(英文)

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

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.

Long-chain alkanol, 1-C18, H37OH, 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-assembled monolayers （SAMs） on HOPG were 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.