新型 SiO2 沉积 CaF2 基底用于水相环境中化学吸附单层的振动和频产生（SFG）测量。
Novel SiO2-deposited CaF2 substrate for vibrational sum-frequency generation (SFG) measurements of chemisorbed monolayers in an aqueous environment.
机构信息
Center for Quantum Life Sciences, Hiroshima University, Higashi-Hiroshima, Japan.
出版信息
Appl Spectrosc. 2012 Jun;66(6):711-8. doi: 10.1366/11-06583.
A novel SiO(2)-deposited CaF(2) (SiO(2)/CaF(2)) substrate for measuring vibrational sum-frequency generation (SFG) spectra of silane-based chemisorbed monolayers in aqueous media has been developed. The substrate is suitable for silanization and transparent over a broad range of the infrared (IR) probe. The present work demonstrates the practical application of the SiO(2)/CaF(2) substrate and, to our knowledge, the first SFG spectrum at the solid/water interface of a silanized monolayer observed over the IR fingerprint region (1780-1400 cm(-1)) using a back-side probing geometry. This new substrate can be very useful for SFG studies of various chemisorbed organic molecules, particularly biological compounds, in aqueous environments.
一种新型的 SiO(2)-沉积 CaF(2)（SiO(2)/CaF(2)）基底已被开发出来，用于测量水相介质中基于硅烷的化学吸附单层的振动和频产生（SFG）光谱。该基底适合硅烷化，并在很宽的红外（IR）探测范围内透明。目前的工作证明了 SiO(2)/CaF(2)基底的实际应用，并且据我们所知，这是首次使用背面探测几何结构在 IR 指纹区域（1780-1400 cm(-1))观察到硅烷化单层在固/水界面的 SFG 光谱。这种新的基底对于水相环境中各种化学吸附有机分子，特别是生物化合物的 SFG 研究非常有用。
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