Formation of Multilayer Composite Particles Comprised of Silica/Vesicle/Silica Particles by Heterocoagulation

Autor:	Kunio Furusawa, and Hideo Kise, Hideo Matsumura, Bo Yang, Kaoru Katoh
Rok vydání:	2001
Předmět:	Materials science Vesicle Composite number Surfaces and Interfaces Condensed Matter Physics Suspension (chemistry) Electrophoresis Adsorption Dynamic light scattering Chemical engineering Electrochemistry General Materials Science Spectroscopy Hydrophobic silica Fumed silica
Zdroj:	Langmuir. 17:2283-2286
ISSN:	1520-5827 0743-7463
DOI:	10.1021/la001088x
Popis:	The multilayer composite particles comprised of silica/PC (phosphatidylcholine) vesicle/silica particles have been prepared by using the heterocoagulation technique. The formation process is as follows: at first, large silica particles (2r = 1.5 μm) and PC vesicles (2r = 0.2 μm) were mixed at a definite particle number ratio in 10-4 M LaCl3 aqueous solution. The PC vesicle/silica composites were spontaneously formed by mutual electrostatic attraction. After removal of the excess PC vesicles from the system, the small silica particle (2r = 0.5 μm) suspension was added into the PC vesicle/silica composite dispersions to form the multilayer composite particles composed of small silica, PC vesicle, and core silica particles. The formation of multilayer composite particles was confirmed by the electrophoresis, dynamic light scattering (DLS), and adsorption measurements of PC molecules. Finally, the existence of multilayers was confirmed directly using a special optical microscope.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ca1d2edf0c6f50fc902595c1609dbc3 https://doi.org/10.1021/la001088x Zobrazit plný text záznamu