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Synthesis and Optical Properties of MoS2 Nanoclusters

Published online by Cambridge University Press:  15 February 2011

J. P. Wilcoxon ,
P. P. Newcomer  and
G. A. Samara
J. P. Wilcoxon
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico, USA 87185
P. P. Newcomer
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico, USA 87185
G. A. Samara
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico, USA 87185
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Abstract

Highly crystalline nanoclusters of MoS2 were synthesized and their optical absorption and photoluminescence spectra were investigated. Key results include: (1) strong quantum confinement effects with decreasing size; (2) preservation of the quasiparticle (or excitonic) Nature of the optical response for clusters down to ∼2.5 nm in size which are only two unit cells thick; (3) demonstration that 3-D confinement produces energy shifts which are over an order of magnitude larger than those due to 1-D confinement; (4) observation of large increases in the spin-orbit splittings at the top of the valence band at the K and M points of the Brillouin zone with decreasing cluster size; and (5) observation of photoluminescence due to both direct and surface recombination.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 452 , 1996 , 371
Copyright
Copyright © Materials Research Society 1997

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References

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