高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (8): 1257.

• 论文 • 上一篇    下一篇

OTS自组装单分子膜在玻璃表面形成过程的AFM研究

徐国华1, Higashitani Ko2   

  1. 1. 浙江大学化工系, 杭州 310027;
    2. Kyoto大学化工系, Kyoto606-1, 日本
  • 收稿日期:1999-08-11 出版日期:2000-08-24 发布日期:2000-08-24
  • 通讯作者: 徐国华(1965年出生),男,博士,副教授,从事表面界面工程研究.E-mail:xugh@che.zju.edu.cn E-mail:xugh@che.zju.edu.cn
  • 基金资助:

    国家教育部留学归国人员科研启动基金

Formation of OTS Self-assembled Monolayer on Glass Surface Investigated by AFM

XU Guo-Hua1, Higashitani Ko2   

  1. 1. Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, China;
    2. Department of Chemical Engineering, Kyoto University, Kyoto 6061, Japan
  • Received:1999-08-11 Online:2000-08-24 Published:2000-08-24

摘要: 运用原子力显微镜研究了十八烷基三氯硅烷在玻璃表面自组装形成单分子膜的过程.通过对样品表面的显微图像、表面平均粗糙度及前进接触角的测量分析,揭示了自组装单分子膜在玻璃表面的生长规律,并探索反应初期玻璃表面的吸附特点.

关键词: 十八烷基三氯硅烷, 自组装单分子膜, 原子力显微镜

Abstract: By using AFM, the process of the OTSmonolayer formation on glass substrate surface by self assembly from 1×10-3 mol/L OTStoluene solution at 18 ℃ was revealed. The analyses of AFMimages as well as the surface mean roughness Ra of the sample surfaces indicated that, after 15 min reaction a smooth OTSmonolayer with a Ra of 0.156 nm/4 μm2 could be obtained on the glass surface. However, this freshly formed OTSmonolayer was unstable, as the reaction proceeds, the Ra of the monolayer would slightly increase within the succeeding 15 min, and finally keep a constant value about 0.170 nm/4 μm2 even for 2 h reaction. The advancing contact angle measurement showed that after~15 min reaction, a completely hydrophobic surface formed with an advancing contact angle of 105°. Our research also showed that during the initial reaction period, most of the adsorption molecules just adsorbed on the substrate surface physically. But some kinds of very strong combination between a few of adsorption molecules and the substrate surface was established, which was much stronger than physical interaction.

Key words: Octadecyltrichlorosilane(OTS), Self-assembled monolayer, Atomic force microscope(AFM)

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