Sum frequency generation (SFG) spectroscopy at surfaces and interfaces: Adsorbate structure and molecular bond orientation

IF 8.2 1区化学 Q1 CHEMISTRY, PHYSICAL

Surface Science Reports Pub Date : 2024-11-01 DOI:10.1016/j.surfrep.2024.100645

Xia Li, Günther Rupprechter

引用次数: 0

Abstract

Infrared (IR)-visible (Vis) sum frequency generation (SFG) is a second-order nonlinear optical process which is forbidden in centrosymmetric bulk media or isotropic phases, but allowed at (open) surfaces or (buried) interfaces where the inversion symmetry is broken. SFG spectroscopy is thus inherently surface- or interface-specific, providing information about the structure, orientation, surface number density, chirality, and dynamics of molecules, provided the system of interest is accessible by light. This review illustrates basic SFG concepts, theory, operation modes (e.g., frequency-domain, broadband, homodyne/heterodyne, time-resolved), and recent extensions and developments of SFG (e.g., doubly resonant, plasmon-enhanced, chiral, microscopy). To illustrate the wide range of SFG applications, selected case studies discuss the characterization of molecular structure and bond orientation at solid-gas, solid-liquid, liquid-air, liquid-liquid, and solid-solid interfaces.

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表面和界面的和频产生（SFG）光谱：吸附物结构和分子键取向

红外(IR)-可见光（Vis）和频率产生（SFG）是一种二阶非线性光学过程，在中心对称体介质或各向同性相中是禁止的，但在反转对称性被破坏的（开放）表面或（埋藏）界面中是允许的。因此，SFG光谱学本质上是表面或界面特异性的，提供有关分子的结构、取向、表面数密度、手性和动力学的信息，前提是感兴趣的系统可以通过光到达。本文阐述了SFG的基本概念、理论、工作模式（如频域、宽带、差外差、时间分辨），以及SFG的最新扩展和发展（如双共振、等离子体增强、手性、显微镜）。为了说明SFG的广泛应用，本文选取了一些案例研究，讨论了固体-气体、固体-液体、液体-空气、液体-液体和固体-固体界面上分子结构和键取向的表征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surface Science Reports 化学-物理：凝聚态物理

CiteScore

15.90

自引率

2.00%

发文量

审稿时长

178 days

期刊介绍： Surface Science Reports is a journal that specializes in invited review papers on experimental and theoretical studies in the physics, chemistry, and pioneering applications of surfaces, interfaces, and nanostructures. The topics covered in the journal aim to contribute to a better understanding of the fundamental phenomena that occur on surfaces and interfaces, as well as the application of this knowledge to the development of materials, processes, and devices. In this journal, the term "surfaces" encompasses all interfaces between solids, liquids, polymers, biomaterials, nanostructures, soft matter, gases, and vacuum. Additionally, the journal includes reviews of experimental techniques and methods used to characterize surfaces and surface processes, such as those based on the interactions of photons, electrons, and ions with surfaces.