期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 341, 期 1, 页码 64-68出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2009.09.014
关键词
Hollow capsules; Layer-by-layer assembly; Colloid templating; Magnetic particles
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [20686046, 2008-2009]
- Murata Science Foundation
Well-defined magnetic hybrid hollow capsules formed with magnetite (Fe3O4) and polyelectrolyte-multilayer films were Successfully prepared through colloidal templating with layer-by-layer assembly of polyelectrolytes, followed by aqueous solution deposition of Fe3O4. Pd catalyst nanoparticles played an important role in the deposition of Fe3O4. Pd nanoparticles favorably adsorbed onto the polyelectrolyte layer with positively charged amino groups. Hollow capsules were obtained by the removal of the melamine-formaldehyde Core particles. Although the Processes were performed in aqueous solutions at temperatures less than 60 degrees C, X-ray diffraction patterns revealed that the deposited Fe3O4 was highly crystallized. The hollow capsules were stably dispersed in water; however, the Capsules rapidly congregated around a locally applied magnet. (C) 2009 Elsevier Inc. All rights reserved.
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