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Ultra‐small‐angle X‐ray and neutron scattering studies on colloidal crystals
Author(s) -
Matsuoka H.,
Harada T.,
Ikeda T.,
Yamaoka H.
Publication year - 2000
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889899012303
Subject(s) - dlvo theory , colloid , scattering , small angle x ray scattering , structure factor , neutron scattering , chemical physics , small angle neutron scattering , materials science , biological small angle scattering , dispersion (optics) , ionic strength , colloidal crystal , colloidal particle , crystallography , chemistry , molecular physics , condensed matter physics , optics , physics , aqueous solution
The formation of colloidal crystals by charged colloidal particles in dispersion at a low ionic strength has been interpreted by the DLVO theory that assumes the electrostatic repulsion between particles to be a dominant factor. However, several recent observations can not be interpreted by the DLVO theory, one of which is our finding obtained by the ultra‐small‐angle X‐ray scattering (USAXS) technique, i.e. , the effect of added salt concentration on the interparticle distance in colloidal crystals. We obtained interesting and significant information by the ultra‐smallangle scattering techniques on the interparticle interaction, which support the existence of a novel factor.