DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/980

Title: CdS/ZnS core–shell nanoparticles in arachidic acid LB films
Authors: MANDAL, P
SRINIVASA, RS
TALWAR, SS
MAJOR, SS
Keywords: absorption spectra
electron diffraction
photoluminescence
blodgett films
Issue Date: 2008
Publisher: Elsevier
Citation: Applied Surface Science 254(16), 5028-5033
Abstract: Core–shell CdS/ZnS nanoparticles in arachidic acid film were prepared through a novel Langmuir–Blodgett (LB) approach. Post-deposition treatment of the precursor LB multilayers of cadmium arachidate with H2S gas followed by intercalation of Zn2+ ions and further sulfidation result in the formation of CdS/ZnS nanoparticles in the LB film. The formation of these nanoparticles and resulting changes in layered structures were studied by FTIR and X-ray reflection measurements. The optical properties were studied using UV–vis absorption and photoluminescence spectroscopy. A red-shift in the absorption spectrum and enhancement of CdS excitonic emission together with reduction of surface states emission suggest that after the intercalation step, a thin layer of ZnS surrounds the CdS nanoparticles, thus forming a core–shell structure. Subsequent to the second sulfidation, a further red-shift in absorption suggests the formation of a thicker ZnS coating on CdS. Electron diffraction of CdS nanoparticles coated with thicker ZnS showed the diffraction patterns of only ZnS, as expected for core–shell structures.
URI: http://dx.doi.org/10.1016/j.apsusc.2008.01.152
http://hdl.handle.net/10054/980
http://dspace.library.iitb.ac.in/xmlui/handle/10054/980
ISSN: 0169-4332
Appears in Collections:Article

Files in This Item:

File Description SizeFormat
5295.pdf767.41 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback