Tunable emission based on the composite of Au nanoparticles and CdSe quantum dots deposited on elastomeric film

Chen, C. W.; Wang, C. H.; Wei, C. M.; Chen, Y. F.
February 2009
Applied Physics Letters;2/16/2009, Vol. 94 Issue 7, pN.PAG
Academic Journal
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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