Dey, Sukumar ; Mohanta, Kallol ; Pal, Amlan J. (2010) Magnetic-field-assisted layer-by-layer electrostatic assembly of ferromagnetic nanoparticles Langmuir, 26 (12). pp. 9627-9631. ISSN 0743-7463
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Official URL: http://pubs.acs.org/doi/abs/10.1021/la101132z
Related URL: http://dx.doi.org/10.1021/la101132z
Abstract
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.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 65787 |
Deposited On: | 28 Apr 2012 12:51 |
Last Modified: | 28 Apr 2012 12:51 |
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