Surface plasmon enhanced photoluminescence and Raman scattering of ultra thin ZnO-Au hybrid nanoparticles

被引：24

作者：

Saravanan, K. ^{[1
]}

Panigrahi, B. K. ^{[2
]}

Krishnan, R. ^{[2
]}

Nair, K. G. M. ^{[2
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, D-01328 Dresden, Germany

[2] Indira Gandhi Ctr Atom Res, Mat Sci Grp, Kalpakkam 603102, Tamil Nadu, India

来源：

JOURNAL OF APPLIED PHYSICS | 2013年 / 113卷 / 03期

关键词：

TEMPERATURE-DEPENDENCE; ZINC-OXIDE; FILMS; VACUUM;

D O I：

10.1063/1.4776654

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report substantially enhanced photoluminescence (PL) and Raman signal from ZnO nanoparticles (NPs) deposited on Si with Au NPs. The resonant excitation of surface plasmon of Au NPs is responsible for the enhanced PL intensity and Raman signal from the ZnO-Au hybrid NPs. Low temperature PL measurements exhibit 14 fold enhancements in the PL intensity of ZnO-Au sample in comparison with ZnO/Si sample. It is found that, at low temperature, the donor bound exciton (DX) has dominant contribution in the PL emission of ZnO-Au hybrid NPs. At high temperature, the free exciton (FX) has dominant contribution in PL emission of these NPs. The thermal activation energies of DX and FX are found to be 5 meV and 50 meV, respectively. The defect related visible PL emission of ZnO is completely suppressed in the ZnO-Au hybrid NPs. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4776654]

引用

页数：5

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