Size-quantization in extremely small CdS clusters formed in calixarene LB films

NABOK, A. V., RICHARDSON, T., MCCARTNEY, C., COWLAM, N., DAVIS, F., STIRLING, C. J. M., RAY, A. K., GACEM, V. and GIBAUD, A. (1998). Size-quantization in extremely small CdS clusters formed in calixarene LB films. Thin Solid Films, 327, 510-514.

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Link to published version:: 10.1016/S0040-6090(98)00699-3

Abstract

CdS nanoparticles have been formed within Y-type Langmuir-Blodgett (LB) films of cadmium salts of calix(8)- and calix(4)-arene by reaction with H2S. UV-vis absorption spectra of the LB films, measured at room temperature, show well-resolved transitions between size-quantization levels in CdS clusters. The size of the CdS particles, obtained by Gaussian fitting of the experimental spectra, is 1.5 +/- 0.3 nm, which is much less than those reported for fatty acid LB films. The particle size does net depend either on the type of calixarene or the number of LB layers. LB films were also characterised by X-ray diffraction and ellipsometry which show the film thickness do not change substantially after treatment with H2S. The mechanism of CdS nanoparticles formation is discussed. (C) 1998 Published by Elsevier Science S.A. All rights reserved.

Item Type: Article
Additional Information: 8th International Conference on Organized Molecular Films AUG 24-29, 1997, PACIFIC GROVE, CALIFORNIA
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group
Identification Number: 10.1016/S0040-6090(98)00699-3
Depositing User: Ann Betterton
Date Deposited: 01 Apr 2010 15:44
Last Modified: 01 Apr 2010 15:44
URI: http://shura.shu.ac.uk/id/eprint/1429

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