QUANTUM CONFINEMENT IN COATED NANOPARTICLES

H.S. Zhou, I. Honma, K.H. Kim, H. Komiyama, H. Sasabe and J.W. Haus
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H.S. Zhou: Department of Chemical Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan;
I. Honma: Department of Chemical Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
K.H. Kim: Department of Chemical Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
H. Komiyama: Department of Chemical Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
H. Sasabe: Department of Chemical Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan;
J.W. Haus: Department of Chemical Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan;

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 133-136

Abstract: We synthesizeCdS/PbS-coated nanoparticles and investigate the spectra of their optical absorption and photoluminescence (PL). The experimental results can be explained by the quantum-confinement model in coated semiconductor nanoparticles. We also prepare gold-coated nanoparticles with a nonmetallic coreAu2Sby a two-step colloidal method, and observe the extraordinary optical absorption spectra of the coated samples. The results are consistent with a theoretical approach that includes electromagnetic resonance effects and the quantum confinement of the carriers in the thin gold shell layer.

Date: 1996
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DOI: 10.1142/S0218625X96000279

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