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The Formation of Close-Packed Two-Dimensional CdSe Colloidal Films by Electric-Field-Induced Deposition

Published online by Cambridge University Press:  10 February 2011

L. Xu ,
X.F. Huang ,
H.M. Chen ,
W. L. Chen ,
Z.G. Liu  and
K.J. Chen
L. Xu
Affiliation:
State key Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R.China
X.F. Huang
Affiliation:
State key Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R.China
H.M. Chen
Affiliation:
State key Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R.China
W. L. Chen
Affiliation:
State key Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R.China
Z.G. Liu
Affiliation:
State key Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R.China
K.J. Chen
Affiliation:
State key Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R.China
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Abstract

Monodispersed CdSe nanocrystals with average diameter of ∼5 nm were synthesized from SeSO32− and rich Cd2+ ionic reagents in aqueous solution. Two-dimensional (2D) close-packed colloidal CdSe films were formed on the electrode surface by electric-field induced deposition method. Transmission electron microscopy (TEM) images show that colloidal CdSe films exhibit different states, named “gas”, “liquid” and “solid” states, which can be transformed by adjusting applied field (E) or deposition time (T). The experimental results demonstrate that the average nearest-neighbor distance of clusters on the electrode surface is inversely proportional to the ET product.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 571: Symposium W – Semiconductor Quantum Dots , 1999 , 81
Copyright
Copyright © Materials Research Society 2000

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References

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