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

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 st...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of non-crystalline solids Vol. 357; no. 19; pp. 3416 - 3423
Main Authors:	Schaut, Robert A., Lobello, Rebecca A., Mueller, Karl T., Pantano, Carlo G.
Format:	Journal Article
Language:	English
Published:	Oxford Elsevier B.V 01-10-2011 Elsevier
Subjects:	ABSORPTION ADSORPTION Atomic structure BORON CALIBRATION Condensed matter: structure, mechanical and thermal properties Disordered solids Exact sciences and technology FINE STRUCTURE FOCUSING FRACTURES GLASS Glasses MATERIALS SCIENCE NEXAFS Physics Structural damage Structure Structure of solids and liquids; crystallography Surface Surface chemistry WATER Boron NEXAFS Adsorption Structure Surface Water Integrated intensity Aluminium oxide Coordination number Phase transformations Glass structure Borosilicate glass EXAFS Local structure Nuclear magnetic resonance Atomic structure Fractography
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	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 B IV species after reaction. ► Here we characterize borosilicate glass surface structure using boron NEXAFS. ► We address technique-related issues with calibration, quantification and interactions between beam and material. ► We observe beam-induced structural damage occurs within the timeframe of typical measurements. ► We observed that water adsorption and reaction at borosilicate surfaces induces structural changes in the local coordination of boron.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 BNL-97692-2012-JA DE-AC02-98CH10886 USDOE SC OFFICE OF SCIENCE (SC)
ISSN:	0022-3093 1873-4812
DOI:	10.1016/j.jnoncrysol.2011.06.008