Formation and UV-vis studies of lead sulfide nanoparticles

YANUAR, H., IWANTONO, B. and NABOK, Aleksey (2019). Formation and UV-vis studies of lead sulfide nanoparticles. Journal of Nano- and Electronic Physics, 11 (2).

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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.

Item Type: Article
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SWORD Depositor: Symplectic Elements
Depositing User: Symplectic Elements
Date Deposited: 30 May 2019 09:09
Last Modified: 18 Mar 2021 05:13

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