Preparation and characterization of polystyrene films containing PbS nanoparticles

Lead sulfide, a narrow band gap semiconductor (Eg = 0.41 eV at room temperature), is very sensitive to finite size effects due to a large exciton Bohr radius (180 A). Since a large blue shift occurs when the size of the PbS nanoparticles falls below the radius of the bulk exciton, this offers the po...

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Published inJournal of materials science Vol. 40; no. 16; pp. 4407 - 4409
Main Authors SREEKUMARI NAIR, P, RADHAKRISHNAN, T, REVAPRASADU, N, KOLAWOLE, G. A, LUYT, A. S, DJOKOVIC, V
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 01.08.2005
Springer Nature B.V
Subjects
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Materials science
Nanoparticles
Polymer industry, paints, wood
Polystyrene resins
Technology of polymers
Semiconductor materials
Thermal decomposition
Morphology
Optical properties
Preparation
Styrene polymer
Nanocomposite
Lead sulfide
Experimental study
Optical absorption
Composite material
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Summary:Lead sulfide, a narrow band gap semiconductor (Eg = 0.41 eV at room temperature), is very sensitive to finite size effects due to a large exciton Bohr radius (180 A). Since a large blue shift occurs when the size of the PbS nanoparticles falls below the radius of the bulk exciton, this offers the possibility to adjust their optical properties in the spectral region between 1 and 2 mm, which is important for many technological applications In the present letter we suggest a procedure for the incorporation PbS nanoparticles in a polystyrene (PS) matrix. The method is based on the thermal decomposition of a lead xanthate complex within the solid polymer.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-005-3831-5