期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 428, 期 -, 页码 189-196出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2015.08.015
关键词
Soda-lime glass; Infrared spectroscopy; Specular reflectance; Attenuated total reflectance; Hydrous species
资金
- National Science Foundation [DMR-1207328]
- Asahi Glass Co.
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1207328] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0844014] Funding Source: National Science Foundation
This paper describes the optical principles of specular reflection (SR) and attenuated total reflection (ATR)-infrared (IR) spectroscopy, both of which are useful methods for glass surface analyses. It should be noted that the shape, position, and relative intensity of peaks in reflectance spectra vary drastically depending on the IR incidence angle as well as the probe method (SR vs. ATR). For example, in SR-IR analyses of soda lime glass, the Si-O-Si stretch band shows a blue-shift from its original position and a new peak grows at similar to 1200 cm(-1) as the IR incidence angle increases. In contrast, the Si-O-Si stretch band appears significantly red-shifted from its original position in the ATR-IR spectra of soda lime glass. SR-IR spectra of thin and flat samples can contain transmission spectral features, due to the reflection from the backside, in the region where the bulk absorption coefficient is low. These artifacts are due to the complex nature of refractive index and should not be interpreted as new peaks or new chemical states of soda lime glass surfaces. An ATR-IR analysis to probe hydrous species in glass surface is demonstrated using two ATR crystals with different refractive indices. (c) 2015 Elsevier B.V. All rights reserved.
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