Peter Chupas (Argonne National Laboratory)

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Location: 184 Nieuwland Science Hall

Using the Pair-Distribution-Function Approach to Study Materials In-situ
Materials scientists have recognized the utility and benefit of producing-nanoscale materials as a means to enhance their functionality (for example in battery materials). A perpetual challenge that continues to hinder our understanding of why certain physical properties (eg. catalytic behavior) change dramatically for many materials as their particle sizes are reduced into the nano length-scale, is the lack of good methods to characterize structure with atomic resolution. This is particularly true with respect to understanding the structure of nano-materials under the conditions which they operate. We have been developing capabilities that allow the atomic-resolution structure of nano-materials to be probed in-situ using the Pair-Distribution-Function (PDF) method. The Pair-Distribution-Function (PDF) method utilizes high-energy X-rays to recover structural information of disordered materials and is particularly advantageous in studying local structure (
Physics Department