TY - JOUR
T1 - Characterization of boroaluminosilicate glass surface structures by B K-edge NEXAFS
AU - Schaut, Robert A.
AU - Lobello, Rebecca A.
AU - Mueller, Karl T.
AU - Pantano, Carlo G.
N1 - Funding Information:
Use of the National Synchrotron Light Source, Brookhaven National Laboratory, was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-98CH10886. Use of the Canadian Light Source was supported by NSERC, NRC, CIHR, and the University of Saskatchewan. Confirmatory NMR experiments were performed by Randy Youngman at Corning Incorporated. This work was financially supported by US Borax/Rio Tinto Minerals, the National Science Foundation Industry-University Center for Glass Research, and the National Science Foundation International Materials Institute for New Functionality in Glass. KTM and CGP also acknowledge the National Science Foundation GOALI Program No. CHE-0809657.
PY - 2011/10
Y1 - 2011/10
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jnoncrysol.2011.06.008
DO - 10.1016/j.jnoncrysol.2011.06.008
M3 - Article
AN - SCOPUS:80051469177
SN - 0022-3093
VL - 357
SP - 3416
EP - 3423
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
IS - 19-20
ER -