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Particle Shape Effects on Optical Absorption in Semiconductor Colloids

Published online by Cambridge University Press:  28 February 2011

P. D. Persans ,
E. Lu ,
J. Haus ,
G. Wagoner  and
A. F. Ruppert
P. D. Persans
Affiliation:
Physics Department, Rensselaer Polytechnic Institute, Troy, NY 12180
E. Lu
Affiliation:
Physics Department, Rensselaer Polytechnic Institute, Troy, NY 12180
J. Haus
Affiliation:
Physics Department, Rensselaer Polytechnic Institute, Troy, NY 12180
G. Wagoner
Affiliation:
Physics Department, Rensselaer Polytechnic Institute, Troy, NY 12180
A. F. Ruppert
Affiliation:
Exxon Research and Engineering Company, Annandale, NJ 08801
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Abstract

The absorption spectrum of small MoS2 particles in colloidal dispersions differs significantly from that of bulk material. In particular the amplitude and position of exciton absorption peaks shifts when small particles are suspended in a dielectric fluid. Our results are compared with predictions of a Maxwell-Garnett effective medium theory for ellipsoidal particles. We find that particle aspect ratio is an important parameter for interpreting these changes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 195: Symposium S – Physical Phenomena in Granular Materials , 1990 , 591
Copyright
Copyright © Materials Research Society 1990

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References

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