单层
化学物理
和频发生光谱学
光谱学
肺表面活性物质
图层(电子)
水溶液
氢键
溶剂化壳
材料科学
和频产生
化学
分析化学(期刊)
分子
溶剂化
物理化学
纳米技术
光学
有机化学
物理
激光器
生物化学
量子力学
非线性光学
作者
Yao Hsiao,Ting-Han Chou,Animesh Patra,Yu-Chieh Wen
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2023-04-14
卷期号:9 (15)
被引量:2
标识
DOI:10.1126/sciadv.adg2823
摘要
Interface-specific hydrogen (H)-bonding network of water directly controls the energy transfer and chemical reaction pathway at many charged aqueous interfaces, yet to characterize these bonded water layer structures remains a challenge. We now develop a sum-frequency spectroscopic scheme with varying photon momenta as an all-optic solution for retrieving the vibrational spectra of the bonded water layer and the ion diffuse layer and, hence, microscopic structural and charging information about an interface. Application of the method to a model surfactant-water interface reveals a hidden weakly donor H-bonded water species, suggesting an asymmetric hydration-shell structure of fully solvated surfactant headgroups. In another application to a zwitterionic phosphatidylcholine lipid monolayer-water interface, we find a highly polarized bonded water layer structure associating to the phosphatidylcholine headgroup, while the diffuse layer contribution is experimentally proven to be negligible. Our all-optic method offers an in situ microscopic probe of electrochemical and biological interfaces and the route toward future imaging and ultrafast dynamics studies.
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