The Physics & Astronomy Colloquium Series presents Phillip Grandinetti, of Ohio State University, on “Measuring Correlated Structural Distributions in Non-Crystalline Materials with Magnetic Resonance Spectroscopy” on Friday, Dec. 8, at 4:10 p.m. in Walter 245.
Phillip Grandinetti
Abstract: A great advantage of solid-state Nuclear Magnetic Resonance (NMR) spectroscopy is its ability to reveal and quantify atomic-level structure in materials where diffraction techniques fail. This is generally true in noncrystalline solids, where diffraction methods rarely reveal structural details beyond the first-coordination sphere except in the simplest of compositions. While it also true that the spectra of non-crystalline solids in many spectroscopies are often broad and featureless, magnetic resonance spectroscopy has a unique advantage in that the different NMR frequency contributions leading to these broadenings can be separated and correlated in multidimensional experiments. In this talk I will describe efforts in our group to develop multi-dimensional multi-nuclear NMR spectroscopic methods that provide new levels of detail about structure in silicate glasses. These results reveal unexpected structural correlations and challenge commonly accepted structural models for silicate glass structure.
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