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PbS nanoparticles in Langmuir–Blodgett films: kinetics of formation and growth
Author(s) -
Savin Yu. N.,
Vitushkina S. V.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301969
Subject(s) - nanocrystal , lead sulfide , monolayer , kinetics , stearate , nanoparticle , chemical engineering , absorption (acoustics) , ion , diffusion , absorption spectroscopy , mass transfer , langmuir–blodgett film , materials science , chemistry , nanotechnology , thermodynamics , organic chemistry , optics , chromatography , physics , quantum dot , engineering , composite material , quantum mechanics
The formation and growth of lead sulfide nanocrystals in lead stearate Langmuir–Blodgett (LB) films are investigated by optical absorption spectroscopy. Kinetics of the concentration changes of lead ions in the different states formed during the growth process, as well as the evolution of the nanocrystal average size versus growth time, are studied. A nonlinear dependence of the nanoparticle growth rate versus time is found. The idea of diffusive decomposition of solid solutions is used to analyze the experimental results. It is shown that high concentrations of metal ions at the interfaces of monolayers of LB films, as well as diffusion restrictions of mass‐transfer processes, play a decisive role in the formation and growth of nanocrystals in ordered organic matrices. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)