Evading the Illusions: Identification of False Peaks in Micro-Raman Spectroscopy and Guidelines for Scientific Best Practice.

Autor: Thyr J; Department of Materials Science and Engineering, Uppsala university, Box 35, 75103, Uppsala, Sweden., Edvinsson T; Department of Materials Science and Engineering, Uppsala university, Box 35, 75103, Uppsala, Sweden.; Energy Materials Laboratory, Chemistry: School of Natural and Environmental Science, Newcastle University, Newcastle Upon Tyne, NE1 7RU, UK.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2023 Oct 23; Vol. 62 (43), pp. e202219047. Date of Electronic Publication: 2023 Sep 13.
DOI: 10.1002/anie.202219047
Abstrakt: Micro-Raman spectroscopy is an important analytical tool in a large variety of science disciplines. The technique is suitable for both identification of chemical bonds and studying more detailed phenomena like molecular interactions, material strain, crystallinity, defects, and bond formations. Raman scattering has one major weakness however: it is a very low probability process. The weak signals require very sensitive detection systems, which leads to a high probability of picking up signals from origins other than the sample. This complicates the analysis of the results and increases the risk of misinterpreting data. This work provides an overview of the sources of spurious signals occurring in Raman spectra, including photoluminescence, cosmic rays, stray light, artefacts caused by spectrometer components, and signals from other compounds in or surrounding the sample. The origins of these false Raman peaks are explained and means to identify and counteract them are provided.
(© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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