Open AccessSIZE EFFECT ON ABSORPTION EDGES OFULTRA-FINE SnO2 NANOPARTICLES
Author(s) -
KANG JUN-YONG,
Shin Tsunekawa,
A. Kasuya
Publication year - 2001
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.50.2198
Subject(s) - nanocrystalline material , transmission electron microscopy , nanoparticle , dynamic light scattering , absorption (acoustics) , aqueous solution , materials science , chemical engineering , blueshift , nanocrystal , diffraction , nanotechnology , analytical chemistry (journal) , chemistry , optics , chromatography , composite material , optoelectronics , organic chemistry , photoluminescence , physics , engineering
Aqueous sols containing nanocrystalline SnO2 particles with sizes less than 2 nm were prepared by ultra-filtration from original acidic and alkaline sols with SnO2 particles. The sizes of SnO2 nanocrystallines were determined by dynamic light scattering, X-ray diffraction, and computer analysis of nanocrystalline images of transmission electron microscopy. Blue shifts of absorption edges of the nanocrystallines were observed in both the ultra-filtrated acidic and alkaline sols. The results show that the blue shifts of the SnO2 nanocrystallines are mainly attributable to the size decrease for the same kind of nanocrystallines.