Kiel Nano, Surface and Interface Science (KiNSIS)

Synthesis and Properties of Heterostructures with Designed Nanoarchitecture (Prof. Dr. Dave C. Johnson, University of Oregon)

05.02.2019 ab 16:00

Technische Fakultät, Gebäude D, Kaisterstraße 2, Aquarium

Abstract

By controlling the composition of an amorphous intermediate on the nanoscale it is possible to kinetically control the self-assembly of new nanostructured compounds consisting of two or more compounds with different crystal structures that are precisely interleaved on the nanoscale. We have used this approach to synthesize hundreds of new metastable compounds with designed nanostructure, including structural isomers. Many of these materials have unprecedented physical properties, including the lowest thermal conductivities ever reported for a fully dense solid, systematic structural changes dependent on nanostructure, and charge density wave transitions. The ability to prepare entire families of new nanostructured compounds and equilibrating them to control carrier concentrations permits a new "thin film metallurgy" or “nanochemistry” in which nanostructure and composition can both be used to tailor physical properties, interfacial structures can be determined for precisely defined constituent thicknesses, and interfacial phenomena and modulation doping can be systematically exploited.

http://sfb1261.de/index.php/en/events-en/talks-for-members/talks-for-members-2019

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