Hacker Christina A, Anderson Kelly A, Richter Lee J, Richter Curt A
National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA.
Langmuir. 2005 Feb 1;21(3):882-9. doi: 10.1021/la048841x.
Aliphatic alcohols and aldehydes were reacted with the Si(111)-H surface to form Si-O-C interfacial bonds from dilute solution by using ultraviolet light. The resulting monolayers were characterized by using transmission infrared spectroscopy, spectroscopic ellipsometry, and contact angle measurements. The effect of different solvents on monolayer quality is presented. The best monolayers were formed from CH(2)Cl(2). The optimized monolayers were thoroughly characterized to determine the film structure and monolayer stability. The UV-promoted, alcohol-functionalized, and aldehyde-functionalized monolayers are of comparable quality to those previously prepared by other means. Although both molecules are tethered through a Si-O-C bond, the film reactivity is distinctly different with the aldehyde films being more chemically resistant. The differences in chemical reactivity, vibrational spectra, hydrophobicity, and ellipsometric thickness between the alcohol and aldehyde monolayers are attributed to a difference in molecular coverage and monolayer formation.
脂肪醇和醛与Si(111)-H表面发生反应，通过紫外线在稀溶液中形成Si-O-C界面键。使用透射红外光谱、光谱椭偏仪和接触角测量对所得单分子层进行了表征。展示了不同溶剂对单分子层质量的影响。最好的单分子层由CH(2)Cl(2)形成。对优化后的单分子层进行了全面表征，以确定膜结构和单分子层稳定性。紫外线促进的、醇官能化的和醛官能化的单分子层质量与之前通过其他方法制备的单分子层相当。尽管两种分子都通过Si-O-C键连接，但醛膜的膜反应性明显不同，化学抗性更强。醇和醛单分子层在化学反应性、振动光谱、疏水性和椭偏厚度方面的差异归因于分子覆盖率和单分子层形成的差异。
