Formation and UV-Vis Studies of Lead Sulfide Nanoparticles

An elegant technique of synthesizing semiconductor lead sulfide nanoparticles (PbS-NPS) embedded in Langmuir-Blodgett (LB) films is presented here. Stearic acids have been used as a matrix to form and grow the quantum-sized PbS. Pure Y-type Pb-salts of stearic acid (SA) LB films were prepared at a d...

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Bibliographic Details
Published inJournal of Nano- and Electronic Physics Vol. 11; no. 2
Main Authors Yanuar, H, Iwantono, B, Nabok, A V
Format Journal Article
LanguageEnglish
Published Sumy Ukraine Sumy State University, Journal of Nano - and Electronic Physics 2019
Subjects
Absorption
Blue shift
Hydrogen sulfide
Langmuir-Blodgett films
Lead sulfides
Nanoparticles
Optical measurement
Particle size distribution
Pressure
Stearic acid
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Summary:An elegant technique of synthesizing semiconductor lead sulfide nanoparticles (PbS-NPS) embedded in Langmuir-Blodgett (LB) films is presented here. Stearic acids have been used as a matrix to form and grow the quantum-sized PbS. Pure Y-type Pb-salts of stearic acid (SA) LB films were prepared at a dipping speed of 15 mm/min and surface pressure of 28 mN/m. PbS-NPs were formed inside LB films of SA by exposure the LB films to hydrogen sulfide (H2S) gas. The preparation of PbS-NPs is discussed in terms of particle formation and growth. The presence of PbS-NPs was investigated by UV-visible absorption. It was found that the PbS-NPs within SA LB films indicated a large blue shift of the optical absorption edge. The estimation of the size distribution performed by optical measurements allows one to attribute the particle range a few nanometers. This figure seems to depend upon the reaction conditions as well as the quality of the initial LB films.
ISSN:2077-6772
2306-4277
DOI:10.21272/jnep.11(2).02029