Characterization of boroaluminosilicate glass surface structures by B K-edge NEXAFS

Robert A. Schaut, Rebecca A. Lobello, Karl T. Mueller, Carlo G. Pantano

Research output: Contribution to journalArticle

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Abstract

Techniques traditionally used to characterize bulk glass structure (NMR, IR, etc.) have improved significantly, but none provide direct measurement of local atomic coordination of glass surface species. Here, we used Near-Edge X-ray Absorption Fine Structure (NEXAFS) as a direct measure of atomic structure at multicomponent glass surfaces. Focusing on the local chemical structure of boron, we address technique-related issues of calibration, quantification, and interactions of the beam with the material. We demonstrate that beam-induced adsorption and structural damage can occur within the timeframe of typical measurements. The technique is then applied to the study of various fracture surfaces where it is shown that adsorption and reaction of water with boroaluminosilicate glass surfaces induces structural changes in the local coordination of boron, favoring BIV species after reaction.

Original languageEnglish (US)
Pages (from-to)3416-3423
Number of pages8
JournalJournal of Non-Crystalline Solids
Volume357
Issue number19-20
DOIs
StatePublished - Oct 1 2011

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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