Nano Archive

Optical absorption spectra of nanocrystalline cupric oxide: possible effects of nanoscopic phase separation

Gizhevskii, B A and Sukhorukov, Yu P and Loshkareva, N N and Moskvin, A S and Zenkov, E V and Kozlov, E A (2005) Optical absorption spectra of nanocrystalline cupric oxide: possible effects of nanoscopic phase separation. Journal of Physics: Condensed Matter, 17 (3). pp. 499-506.

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Official URL: http://stacks.iop.org/0953-8984/17/499

Abstract

Optical absorption spectra of nanocrystalline cupric oxide CuO samples, obtained using the converging spherical shock wave procedure, reveal significant spectral weight red-shift as compared with spectra of single-crystalline CuO samples. In addition, some of these samples manifest remarkable temperature-dependent resonances near 1.3-1.6 eV. The minimal model suggested to explain both effects implies the CuO nanoceramic to be a metastable system of metallic-like nanoscale droplets with Drude optical response, nucleating in the bare insulating medium under the stimulating influence of the conditions of the specimen treatment. Simple effective medium theory is shown to provide a reasonable description of the experimental spectra in terms of the plasmon features due to the droplet phase.

Item Type:Article
ID Code:5469
Deposited By:Prof. Alexey Ivanov
Deposited On:06 Feb 2010 11:11
Last Modified:06 Feb 2010 11:53

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