Solvent Effects on Molecular Packing and Tribological Properties of Octadecyltrichlorosilane Films on Silicon
Solvent Effects on Molecular Packing and Tribological Properties of Octadecyltrichlorosilane Films on Silicon
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DOI：
10.1021/la904656y
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发表时间：
2010-06-01
期刊：
影响因子：
3.9
通讯作者：
Hsieh, Shuchen
中科院分区：
文献类型：
--
作者：
Cheng, Yue-an;Zheng, Bin;Hsieh, Shuchen
使用十六烷、甲苯、氯仿和二氯甲烷在硅基底上制备十八烷基三氯硅烷的自组装单层薄膜，以确定溶剂对分子堆积和摩擦学性能的影响。形貌原子力显微镜图像用于评估薄膜质量并确定表面粗糙度，摩擦学测量（包括摩擦力、粘附力和弹性）提供了有关薄膜局部纳米级堆积的附加信息。我们的结果表明溶剂粘度和极性影响薄膜的摩擦学性能。使用十六烷制备的薄膜表现出优异的性能。 Langmuir-Blodgett 实验表明，十八烷基三氯硅烷和十六烷分子之间的分子间相互作用比本研究中任何其他溶剂都更强。这些结果表明，溶剂性质是单层薄膜制备和摩擦控制表面优化的重要考虑因素。
Self-assembled monolayer films of octadecyltrichlorosilane were prepared on silicon substrates using hexadecane, toluene, chloroform, and dichloromethane to determine the effects of solvent on molecular packing and tribological properties. Topographical atomic force microscopy images were used to evaluate the film quality and determine surface roughness, and tribological measurements, including friction, adhesion, and elasticity, provided additional information on the local nanoscale packing of the films. Our results showed that solvent viscosity and polarity affected the tribological properties of the films. with films prepared using hexadecane exhibiting superior properties. Langmuir- Blodgett experiments indicated that intermolecular interactions were stronger between octadecyltrichlorosilane and hexadecane molecules than for any other solvent in this study. These results demonstrate that solvent properties arc an important consideration in monolayer film preparation and optimization for friction controlled surfaces.