Optical properties and luminescence of metallic nanoclusters in ZnO:Cu

Copper nanoparticles have been formed in a zinc oxide (ZnO) substrate by Cu implantation at 160 keV. The implant layer shows amorphised behaviour as monitored by the RBS data and optical absorption indicates the surface plasmon resonance peak characteristic of copper nanoparticles. There is nonlinea...

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Veröffentlicht in:Physica. B, Condensed matter Condensed matter, 2005-06, Vol.363 (1), p.88-95
Hauptverfasser: Karali, T., Can, N., Valberg, L., Stepanov, A.L., Townsend, P.D., Buchal, Ch, Ganeev, R.A., Ryasnyansky, A.I., Belik, H.G., Jessett, M.L., Ong, C.
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container_end_page 95
container_issue 1
container_start_page 88
container_title Physica. B, Condensed matter
container_volume 363
creator Karali, T.
Can, N.
Valberg, L.
Stepanov, A.L.
Townsend, P.D.
Buchal, Ch
Ganeev, R.A.
Ryasnyansky, A.I.
Belik, H.G.
Jessett, M.L.
Ong, C.
description Copper nanoparticles have been formed in a zinc oxide (ZnO) substrate by Cu implantation at 160 keV. The implant layer shows amorphised behaviour as monitored by the RBS data and optical absorption indicates the surface plasmon resonance peak characteristic of copper nanoparticles. There is nonlinear optical absorption from the Cu nanoparticles. There are numerous changes in the luminescence responses which include a variety of green and yellow emission bands. During excitation there were changes in the cathodoluminescence intensity and lifetime influenced by the surface events, including some unusual features, which may be considered in terms of interactions with surface water and ice. Radioluminescence signals oscillate between the normal emission bands and the wide red line emission from free Zn. Overall ZnO is, therefore, an unexpectedly interesting host for dispersed Cu nanoparticles, not least because the optical features may be compatible with the semiconductor aspects of ZnO.
doi_str_mv 10.1016/j.physb.2005.03.006
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subjects Cu nanoparticles
Luminescence
Optical property
RBS
ZnO
title Optical properties and luminescence of metallic nanoclusters in ZnO:Cu
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