Skip to main content
Article thumbnail
Location of Repository

Optical and AFM study of electrostatically assembled films of CdS and ZnS colloid nanoparticles.

By S. Suryajaya, Alexei Nabok, Frank Davis, A. Hassan, Seamus P. J. Higson and J. Evans-Freeman

Abstract

CdS and ZnS semiconducting colloid nanoparticles coated with the organic shell, containing either SO3− or NH2+ groups, were prepared using the aqueous phase synthesis. The multilayer films of CdS (or ZnS) were deposited onto glass, quartz and silicon substrates using the technique of electrostatic self- assembly. The films produced were characterized with UV–vis spectroscopy, spectroscopic ellipsometry and atomic force microscopy. A substantial blue shift of the main absorption band with respect to the bulk materials was found for both CdS and ZnS films. The Efros equation in the effective mass approximation (EMA) theoretical model allowed the evaluation of the nanoparticle radius of 1.8 nm, which corresponds well to the ellipsometry results. AFM shows the formation of larger aggregates of nanoparticles on solid surf

Topics: Colloid nanoparticles, Electrostatic self-assembly, Quantum confinement, Ellipsometry
Publisher: Elsevier Science B.V., Amsterdam.
Year: 2008
DOI identifier: 10.1016/j.apsusc.2008.01.134
OAI identifier: oai:dspace.lib.cranfield.ac.uk:1826/3195
Provided by: Cranfield CERES
Journal:

Suggested articles

Citations

  1. (2002). A doi
  2. (1999). A K and Ray A K doi
  3. (1992). Ellipsometry and Polarized Light North-Holland
  4. (2002). Yoffe A D doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.