Melting of Zn nanoparticles embedded in SiO2 at high temperatures: Effects on surface plasmon resonances

Amekura, H.; Kishimoto, N.; Tanaka, M.; Shinotsuka, H.; Ohnuma, M.; Kobayashi, K.; Yoshikawa, H.; Mantl, S.; Buchal, Ch.; Matsushita, Y.; Katsuya, Y.; Tanuma, S.

doi:10.1063/1.3290984

Journal Article

Melting of Zn nanoparticles embedded in SiO2 at high temperatures: Effects on surface plasmon resonances

Amekura, H. ; Tanaka, M. ; Katsuya, Y. ; Yoshikawa, H. ; Shinotsuka, H. ; Tanuma, S. ; Ohnuma, M. ; Matsushita, Y. ; Kobayashi, K. ; Buchal, C.FZJ* ; Mantl, S.FZJ* ; Kishimoto, N.

2010
American Institute of Physics Melville, NY

Applied physics letters 96, 023110 (2010) [10.1063/1.3290984]

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Please use a persistent id in citations: http://hdl.handle.net/2128/17337 doi:10.1063/1.3290984

Abstract: Zn nanoparticles at room temperature show two absorption peaks in the near-infrared (NIR) and the ultraviolet (UV) regions, both of which satisfy the criterion of surface plasmon resonance (SPR). From x-ray diffraction at high temperatures, it was found that the Zn nanoparticles in SiO2 melt at 360-420 degrees C and solidify at 250-310 degrees C with a large temperature hysteresis. While the NIR peak disappears with melting, the UV peak shows sudden energy shift with melting but survives even after the melting. The first-principle band calculation ascribes the UV and NIR peaks to SPR-enhanced inter- and intraband transitions, respectively.

Keyword(s): J ; ab initio calculations (auto) ; infrared spectra (auto) ; melting (auto) ; nanoparticles (auto) ; silicon compounds (auto) ; solidification (auto) ; surface plasmon resonance (auto) ; ultraviolet spectra (auto) ; X-ray diffraction (auto) ; zinc (auto)

Classification:

Physics, Applied

Note: A part of this study was granted from The Murata Science Foundation. The authors thank the staffs of BL15XU, NIMS, and of SPring-8 for their help at the beamline. The GIXRD measurements at HT were performed under the approval of NIMS Beamline Station (Proposal Nos. 2006B4501, 2007A4501, and 2007B4502).

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