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Polarization-Dependent Sum-Frequency Generation Spectroscopy for Ångstrom-Scale Depth Profiling of Molecules at Interfaces.
Yu, Chun-Chieh; Seki, Takakazu; Wang, Yongkang; Bonn, Mischa; Nagata, Yuki.
Afiliación
  • Yu CC; Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany.
  • Seki T; Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany.
  • Wang Y; Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany.
  • Bonn M; Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany.
  • Nagata Y; Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany.
Phys Rev Lett ; 128(22): 226001, 2022 Jun 03.
Article en En | MEDLINE | ID: mdl-35714258
The three-dimensional spatial distribution of molecules at soft matter interfaces is crucial for processes ranging from membrane biophysics to atmospheric chemistry. While several techniques can access surface composition, obtaining information on the depth distribution is challenging. We develop a noninvasive, polarization-resolved, surface-specific sum-frequency generation spectroscopy providing quantitative depth information. We demonstrate the technique on formic acid molecules at the air-water interface. With increasing molar fraction from 2.5% to 10%, the formic acid molecules shift, on average, ∼0.9 Å into the bulk. The consistency with the simulation data manifests that the technique allows for probing the Ångstrom-scale depth profile.
Asunto(s)

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Agua Idioma: En Revista: Phys Rev Lett Año: 2022 Tipo del documento: Article País de afiliación: Alemania

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Agua Idioma: En Revista: Phys Rev Lett Año: 2022 Tipo del documento: Article País de afiliación: Alemania