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Superlattices of Semiconductor Quantum‐Size Lead Sulfide Particles Prepared by Topotactic Gas–Solid Reaction
Author(s) -
Guo Shouwu,
PopovitzBiro Ronit,
Arad Talmon,
Hodes Gary,
Leiserowitz Leslie,
Lahav Meir
Publication year - 1998
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199806)10:9<657::aid-adma657>3.0.co;2-1
Subject(s) - lead sulfide , materials science , nucleation , superlattice , fourier transform infrared spectroscopy , sulfide , nanoparticle , diffraction , infrared spectroscopy , chemical engineering , inorganic chemistry , nanotechnology , organic chemistry , quantum dot , chemistry , optoelectronics , engineering , metallurgy , physics , optics
Superlattices of quantum particles can be prepared by topotactic gas–solid reaction, as demonstrated here. The preparation of disk‐like lead sulfide nanoparticles arranged within organic crystals of n ‐alkanoic acids or thin films of ω‐hydroxyalkoxy phenyl propionic acids by reaction of the corresponding lead salts with gaseous H 2 S is described. The progress of the reaction is monitored by Fourier transform infrared spectroscopy and X‐ray powder diffraction. Three processes are identified as being involved in the transformation: reaction, diffusion, and nucleation.