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Vacuum deposited silver Chemically deposited silver

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Vacuum deposited silver Chemically deposited silver

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  1. This project focuses on chemical deposition of poly-crystalline silver films on planar silica substrates, and characterization of the composite materials. In particular, we focus here on the room-temperature electronic transport properties of these materials, as to date no such studies have been reported. A modified Tollen’s reaction is utilized to deposit rough silver films with average thicknesses in the range of 80 – 300 nm.[1] Electron microprobe studies of the materials reveal extreme disorder and granularity, while resistance measurements result in typically high values. It was not possible to extract a useful measure of thickness necessary for characterizing the films’ resistivities. A new thickness parameter, defined as with tm the film’s measured mass thickness and f the filling fraction of metal in the film, is found to play the standard role of thickness, allowing the implementation of classical electron transport theory. a b Vacuum deposited silver Chemically deposited silver slope = -1.29 R(Ω) R(Ω) Scaling of resistance of chemically deposited films with renormalized thickness parameter. Electron Transport in Chemically Deposited Silver FilmsMiriam Deutsch, University of Oregon, DMR-0239273 [1] M.S.M.Peterson, J. Bouwman, A. Chen, and M. Deutsch, J. Colloid Inter. Sci. 306, 41 (2007)

  2. Metamaterial Optical Coatings for Broadband Asymmetric Mirrors Miriam Deutsch, University of Oregon DMR-0239273 Outreach: We have written a comprehensive computer program for calculating light scattering from metallodielectric spherical Bragg resonators utilizing a plane-wave multipole expansion. The code is available on our group website as a free download. See http://www.mo.uoregon.edu/resources.html Our research on broadband asymmetric mirrors has yielded one patent application, filed November 2006. Education: Five graduate students (Sarah Emmons, Charles Rhode, Lawrence Davis, Aiqing Chen and Keisuke Hasegawa) are currently working in the group. Sarah Emmons is a Chemistry graduate student. For three years she was the recipient of the NSF GK-12 fellowship. Charles Rhode is a Physics graduate student. He was an NSF IGERT fellow during the 2002-2003 academic year. Lawrence Davis, Aiqing Chen and Keisuke Hasegawa are Physics graduate students. Undergraduate and REU students also regularly participate in research in our group.

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