Electro-optics of polyelectrolyte multilayers on colloidal particles

被引:4
作者
Milkova, Viktoria [1 ]
Kamburova, Kamelia [1 ]
Radeva, Tsetska [1 ]
机构
[1] Bulgarian Acad Sci, Inst Phys Chem, BU-1113 Sofia, Bulgaria
关键词
Colloid/polyelectrolyte complexes; Polyelectrolyte multilayer films; Electro-optics; Anisometric colloidal particles; Multilayer film thickness; Electrical polarizability; ELECTRICAL-PROPERTIES; FILMS; THICKNESS; COATINGS; BEHAVIOR; INDOMETHACIN; NANOCOLLOIDS; COUNTERIONS; IONIZATION; SONICATION;
D O I
10.1016/j.colsurfa.2013.12.017
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Electric light scattering method is used to study electrical properties and structure of polyelectrolyte multilayer films adsorbed on non-spherical particles in the absence of salt. Attention is focused on the advantage of electro-optics to give information simultaneously on the dynamics of counterions and the thickness of the multilayer films adsorbed on the particles in stabilized suspensions. Based on the electro-optical experiment, it is demonstrated that polarization of counterions along the chains of the last-deposited polymer governs the behavior of the whole multilayer film. Evidence is given that the film thickness can increase exponentially with the number of deposited layers even in the absence of salt when a fully charged polyelectrolyte is combined with a weakly charged one. Examples are presented for electro-optical characterization of multilayer films on colloidal particles with potential applications in anticorrosion coatings and medicine. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:502 / 509
页数:8
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