十八烷基三氯硅烷(OTS)单层膜改性熔融石英表面水分子结构和pH值相关性的和频光谱(SFG)研究

2008/04/26   下载量: 146

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应用领域 石油/化工
检测样本 其他
检测项目
参考标准 暂无

The interface-sensitive spectroscopic method, sum frequency generation (SFG), has been used to investigate the interfacial water structure on a fused quartz surface modiDed by an octadecyltrichlorosilane (OTS) self-assembled monolayer in phosphate bu†ered solutions at various pHs. The experimental results demonstrate that the water molecules at the quartz/OTS surface Ñip while the water molecules at the OTS surface maintain their orientation when the solution pH is changed from neutral to acidic. The results show that most of the silanol groups still exist on the fused quartz surface even after a silane coupling reaction of OTS under the reported experimental conditions.

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