Surface plasmon enhanced quantum transport in a hybrid metal nanoparticle array |
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Authors: | Lin Sun Yali NanShang Xu Sishi ZhangMin Han |
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Affiliation: | Key Laboratory of Modern Acoustics and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China |
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Abstract: | Hybrid Pd–Ag nanoparticle arrays composed of randomly distributed Pd nanoparticles in dense packing and a small number of dispersed Ag nanoparticles were fabricated with controlled coverage. Photo-enhanced conductance was observed in the nanoparticle arrays. Largest enhancement, which can be higher than 20 folds, was obtained with 450 nm light illumination. This wavelength was found to correlate with the surface plasmon resonance of the Ag nanoparticles. Electron transport measurements showed there were significant Coulomb blockade in the nanoparticle arrays and the blockade could be overcome with the surface plasmon enhanced local field of Ag nanoparticles induced by light illumination. |
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Keywords: | Nanoparticle array Quantum transport Surface plasmon Local field enhancement Photo-conductance |
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