Polarization-Dependent Heterodyne-Detected Sum-Frequency Generation Spectroscopy as a Tool to Explore Surface Molecular Orientation and Ångström-Scale Depth Profiling

Autor:	Chun-Chieh Yu, Takakazu Seki, Kuo-Yang Chiang, Fujie Tang, Shumei Sun, Mischa Bonn, Yuki Nagata
Rok vydání:	2022
Předmět:	Spectrum Analysis Materials Chemistry Physical and Theoretical Chemistry Vibration Surfaces Coatings and Films
Zdroj:	The Journal of Physical Chemistry B
ISSN:	1520-5207 1520-6106
DOI:	10.1021/acs.jpcb.2c02178
Popis:	Sum-frequency generation (SFG) spectroscopy provides a unique optical probe for interfacial molecules with interface-specificity and molecular specificity. SFG measurements can be further carried out at different polarization combinations, but the target of the polarization-dependent SFG is conventionally limited to investigating the molecular orientation. Here, we explore the possibility of polarization-dependent SFG (PD-SFG) measurements with heterodyne detection (HD-PD-SFG). We stress that HD-PD-SFG enables accurate determination of the peak amplitude, a key factor of the PD-SFG data. Subsequently, we outline that HD-PD-SFG can be used not only for estimating the molecular orientation but also for investigating the interfacial dielectric profile and studying the depth profile of molecules. We further illustrate the variety of combined simulation and PD-SFG studies.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::194b6cc9dba21a557a47874875b488eb https://doi.org/10.1021/acs.jpcb.2c02178 Zobrazit plný text záznamu