Formation and UV-Vis Studies of Lead Sulfide Nanoparticles

Автор(ы) H. Yanuar1, B. Iwantono1, A.V. Nabok2

1Department of Physics, Universitas Riau, 28132 Pekanbaru, Indonesia

2Materials and Engineering Research Institute, Sheffiled Hallam University, Sheffield S1 1WB, UK

Выпуск Том 11, Год 2019, Номер 2
Даты Получено 22 декабря 2018; в отредактированной форме 04 апреля 2019; опубликовано online15 апреля 2019
Ссылка H. Yanuar, B. Iwantono, A.V. Nabok, J. Nano- Electron. Phys. 11 No 2, 02029 (2019)
PACS Number(s) 78.67.Bf, 81.16.Rf
Ключевые слова LB films, PbS-NPs, Quantum confinement (5) , Energy gap.

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.

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