Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3086282
Keywords
cadmium compounds; elasticity; gold; II-VI semiconductors; nanoparticles; photoluminescence; polymer films; semiconductor quantum dots; surface plasmons; wide band gap semiconductors
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Funding
- National Science Council of the Republic of China
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A simple approach to investigate the dependence of emission on the separation distance between metal nanoparticles and semiconductor quantum dots is demonstrated. Without varying the mixed concentrations, a tunable emission is achieved based on the deposition of the composite of Au nanoparticles and CdSe quantum dots on elastomeric film. By utilizing the inherent nature of the elasticity of the elastomeric film, it is found that depending on the separation distance, the emission intensity can be quenched or enhanced. The underlying mechanism can be explained quite well by the interplay between the local field excitation due to surface plasmons and electrons transfer to metal nanoparticles.
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