期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 13, 期 17, 页码 3886-3889出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.2c00574
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资金
- United States Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences Biosciences
- United States Department of Energy, Office of Science, Office of Biological and Environmental Research, through the bioimaging technology development program
Tip-enhanced Raman spectroscopy is a powerful technique for high-resolution chemical imaging. It can track plasmon-induced/enhanced chemical reactions and provide accurate spectral assignments.
Tip-enhanced Raman spectroscopy (TERS) is a powerful technique that enables ultrahigh spatial resolution and ultrasensitive chemical imaging. This technique's ability to track plasmon-induced/enhanced chemical reactions in real space has gained increasing popularity in recent years. In this study, we expose inherent difficulties associated with assigning TERS signatures that accompany chemical transformations. Namely, distinct selection rules as well as the possibility of multiple physical processes/chemical reaction pathways complicate spectral assignments and necessitate caution in assigning the experimental observables. 'We illustrate the latter using 4,4'-dimercaptostilbene-functionalized plasmonic silver nanocubes, wherein we identify the TERS signatures of product formation, molecular charging, multipolar Raman scattering, and preferred molecular orientations that all lead to distinct and assignable spectral patterns.
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