高能所科技創(chuàng)新論壇（299）
報告題目: Discovery, design and prediction of inorganic solids: structural diversity to applications
報告人: Prof. Mercouri G Kanatzidis (Northwestern University)
主持人：石偉群 研究員
時間: 12月10日上午10:00
地點:物理樓B326會議室
報告簡介:
An ultimate goal in the field of chemistry is to identify and promote foundational and rational approaches needed to turn synthesis art into science by combining the exquisite predictability of organic synthesis with the high yields of solid state chemistry. The search for new inorganic materials and efficient syntheses is therefore a fundamental goal of chemistry. In contrast to solid-state methods, inorganic syntheses in liquid fluxes permit bond formation, framework assembly and crystallization at lower temperatures due to facile diffusion and chemical reactions with and within the flux itself. The liquid fluxes are bona-fide solvents similar to conventional organic or aqueous solvents. These reactions can produce a wide range of materials, often metastable, from oxides to intermetallics, but typically the formation mechanisms are poorly understood. In this talk the speaker will describe how they design, approach, perform, observe, understand, and engineer the formation of compounds from inorganic melts. He will focus on how novel chalcogenides can form using the fluxes but also design concepts such as the “dimensional reduction” and “panoramic synthesis”. For example, in systems such as K-Cu-S and K-Sn-S compounds that span metallic and insulating behavior can be isolated. Common structural motifs within these materials systems belie structural precursors in the melt that may be controlled by tuning reaction conditions and composition. Using complementary techniques of in-situ x-ray diffraction we can create time-dependent maps of reaction space and probe the mobile species present in melts. An important link in our chemistry is the concept of a ‘functional group,’ a fragment of a few atoms that behaves predictably when combined with other functional groups or reagents. When well defined building blocks are present and stable in the reaction, prospects for increased structural diversity and product control increase substantially. In such tunable and dynamic fluxes, synthesis can be directed towards new materials. The speaker will highlight routes toward the ultimate goal of targeted materials synthesis by controlling inorganic melt chemistry. He will also highlight examples of technological materials designed or discovered in this fashion.
報告人簡介:
Mercouri G Kanatzidis教授
Department of Chemistry, Northwestern University, Evanston, IL 60208
Website: http://chemgroups.northwestern.edu/kanatzidis/
EXPERIENCE
8/06-Present: Professor of Chemistry, Northwestern University and Senior Scientist, Argonne National Laboratory, Materials Science Division, Argonne, IL
7/93-8/06: Professor of Chemistry, Michigan State University
7/91-6/93: Associate Professor, Michigan State University
7/87-6/91: Assistant Professor, Michigan State University
Publications >1075, citations >50,000, H index 102. Patents: 38
Over 500 invited presentations. Over thirty plenary lectures.
高能所科研計劃處、黨政聯(lián)合辦、教育處
2018年11月30日
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