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Title: Synthesis of PbS-Al2O3 nanocomposites by sol-gel process and studies on their optical properties
Authors: Yadav S.K.
Jeevanandam, Pethaiyan
Published in: Optical Materials
Abstract: PbS-Al2O3 nanocomposites were prepared by a single step sol-gel method starting from lead acetate, thiourea and aluminium isopropoxide. The crystallinity, shape of crystallites and optical properties of the nanocomposites were examined by various analytical techniques. X-ray diffraction indicates that the PbS-Al2O3 nanocomposites consist of small PbS crystallites (18.2-40.5 nm). Transmission electron microscopy images show cube-like and flake-like morphology for pure PbS and Al2O3, respectively and TEM images of the nanocomposites indicate uniform distribution of PbS nanoparticles on the Al2O3 matrix. Diffuse reflectance spectral (DRS) studies on the nanocomposites indicate near infrared (NIR) absorption and the nanocomposites exhibit blue shift of the band gap of PbS compared to pure PbS nanoparticles. Photoluminescence studies show characteristic peak due to excitonic emission of PbS nanoparticles in the nanocomposites. © 2015 Elsevier B.V. All rights reserved.
Citation: Optical Materials (2015), 46(): 209-215
Issue Date: 2015
Publisher: Elsevier B.V.
Keywords: Nanocomposites
NIR absorption
Optical properties
Sol-gel method
ISSN: 9253467
Author Scopus IDs: 56606357600
Author Affiliations: Yadav, S.K., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Jeevanandam, P., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Funding Details: The award of Senior Research Fellowship (SRF) to Mr. Sudheer Kumar Yadav by the University Grants Commission, Government of India, is gratefully acknowledged. The authors are thankful to the Institute Instrumentation Centre, Indian Institute of Technology Roorkee for providing the facilities.
Corresponding Author: Jeevanandam, P.; Department of Chemistry, Indian Institute of Technology RoorkeeIndia; email:
Appears in Collections:Journal Publications [CY]

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