Magnetic-Field-Assisted Layer-by-Layer Electrostatic Assembly of Ferromagnetic Nanoparticles

被引：33

作者：

Dey, Sukumar ^{[1
]}

Mohanta, Kallol ^{[1
]}

Pal, Amlan J. ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, W Bengal, India

来源：

LANGMUIR | 2010年 / 26卷 / 12期

关键词：

CDSE NANOPARTICLES; ELECTRICAL BISTABILITY; FILMS; POLYELECTROLYTES; MULTILAYERS; ADSORPTION; DIODES;

D O I：

10.1021/la101132z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report that layer-by-layer (LbL) electrostatic assembly of Fe3O4 nanoparticles can be supplemented by orienting magnetic domains of the nanoparticles. With the oriented domains of ionic-capped nanoparticles, both magnetic and electrostatic forces of attraction become operative during the LbL deposition process. The magnetic-field-assisted LbL adsorption process has been evidenced by increased electronic absorbance of the films. While atomic force microscopy studies rule out formation of multiple layers during a single adsorption process, magnetic force microscopy images evidence oriented domains in the LbL films. The results show a novel route for LbL deposition of ferromagnetic nanoparticles with oriented magnetic domains in the thin films.

引用

页码：9627 / 9631

页数：5

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