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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
Published on: March 2, 2016
Au-PbS core-shell nanocrystals: plasmonic absorption enhancement and electrical doping via intra-particle charge
Jong-Soo Lee1, Elena V Shevchenko, Dmitri V Talapin
1Department of Chemistry, University of Chicago, Chicago, Illinois 60637, USA.
Abstract:
We present a comparative study of optical and electronic properties for PbS nanocrystals and Au-PbS core-shell nanostructures. In Au-PbS nanostructures, we observed two nontrivial synergistic effects: (i) extinction enhancement due to coupling of surface plasmon resonance in the Au core to the excitonic states in the semiconducting PbS shell, and (ii) strong p-type electronic doping of Au-PbS nanocrystal solids that we explained by the intraparticle charge transfer between the PbS shell and the Au core.
