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Angewandte Chemie 42 (2003) 5296-5299 JACS 127 (2005) 7843-7848

Synthesis of and Structure-Function Relationships in Heterostructures of Quasi-2D Materials David Johnson, David Cohen and Stephen Kevan University of Oregon DMR-0103409. Angewandte Chemie 42 (2003) 5296-5299 JACS 127 (2005) 7843-7848.

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Angewandte Chemie 42 (2003) 5296-5299 JACS 127 (2005) 7843-7848

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  1. Synthesis of and Structure-Function Relationships in Heterostructures of Quasi-2D MaterialsDavid Johnson, David Cohen and Stephen KevanUniversity of Oregon DMR-0103409 Angewandte Chemie 42 (2003) 5296-5299 JACS 127 (2005) 7843-7848 The ability to control the kinetics of solid state reactions has enabled the synthesis of entire families of compounds that consist of ordered intergrowths of two binary compounds. Intergrowths between layered compounds and between layered compounds and compounds with rock salt structures have been successfully prepared. Charge transfer between the components has been used to stabilize metastable structures. Extremely low thermal conductivities have been measured in both films and bulk pellets of these nanolaminate structures. Schematic of the structure of misfit layered compounds (NbSe2)x(BiSe)y and (NbSe2)x(CeSe)y synthesized.

  2. Synthesis of and Structure-Function Relationships in Heterostructures of Quasi-2D MaterialsDavid Johnson, David Cohen and Stephen KevanUniversity of Oregon DMR-0103409 Societal Impact: The ability to prepare nanostructured solids as both film and bulk samples with unit cell control offers unprecedented access to families of nanostructured compounds. Promising thermoelectric materials and extremely thermally insulating films have been found already. Education: Seven undergraduate students (Brandon Howe, Stacey Standridge, Carol Feik, Ben Matelich, Maisha Kumunde, Thomas Allen, Luke Sheppard, and Scott Duncombe) contributed to this program. Brandon is currently a graduate student at Illinois, Stacey is a graduate student at Northwestern, Ben, Thomas and Maisha are in their final years at Chico State, the UO and Montana State respectively. Scott is a sophomore at the University of Chicago. Four graduate students (Fred Harris, Polly Berseth, Ngoc Nguyen and Michael Fenci) and two visiting faculty members (Brian McBurnett and Robert Schneidmiller) contributed to this work. Fred, after an Internship with Intel Corporation, and Polly received their Ph.D’s in the fall of 2004 Ngoc will receive his Ph.D. in early 2006. Outreach: For the second year, a research “boot camp’ was held to prepare undergraduate students for research in materials chemistry. 7 students from throughout the Northwest participated in June of 2005 and did summer research either at the University of Oregon or their home institutions.

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