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Electrophoretic Deposition of CdSe Nanocrystal Films on Conducting Electrodes

Published online by Cambridge University Press:  11 February 2011

Mohammad A. Islam ,
Yuqi Xia ,
Benjamin J. Kraines  and
Irving P. Herman
Mohammad A. Islam
Affiliation:
Department of Applied Physics and Applied Mathematics
Yuqi Xia
Affiliation:
Department of Physics
Benjamin J. Kraines
Affiliation:
Materials Research Science and Engineering Center, Columbia University, New York, NY 10027, U.S.A.
Irving P. Herman
Affiliation:
Department of Applied Physics and Applied Mathematics
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Abstract

A dc electric field is used to attract thermally charged CdSe nanocrystals in solution to rapidly form large-area, micron-thick films of equal thickness on both electrodes. A pair of Au-on-Si or conducting ITO-on-glass electrodes was submerged in the nanoparticle solution and a dc voltage was applied in a dark room. Uniform, robust, very smooth, and apparently identical films formed on both electrodes. Photoluminescence and absorption of the films showed that they are indeed made of dense arrays of individual nanocrystals. The deposition implies there are both positively and negatively thermally charged dots in solution. These high quality dense arrays of the nanoparticles could be useful in several applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 737 , 2002 , F5.5
Copyright
Copyright © Materials Research Society 2003

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References

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