Issue 16, 2013
From the journal:

Nanoscale

Magnetically responsive dry fluids†

Filipa L. Sousa,*a   Rodney Bustamante,b   Angel Millán,b   Fernando Palacio,b   Tito Trindadea  and  Nuno J. O. Silva*c  

* Corresponding authors

a Departamento de Química and CICECO, Aveiro Institute of Nanotechnology, Universidade de Aveiro, 3810-193 Aveiro, Portugal
E-mail: filipalsousa@ua.pt
Fax: +351 234 370 084
Tel: +351 234 370 736

b Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Departamento de Física de la Materia Condensada, Facultad de Ciencias, 50009 Zaragoza, Spain

c Departamento de Física and CICECO, Aveiro Institute of Nanotechnology Universidade de Aveiro, 3810-193 Aveiro, Portugal

Abstract

Ferrofluids and dry magnetic particles are two separate classes of magnetic materials with specific niche applications, mainly due to their distinct viscosity and interparticle distances. For practical applications, the stability of these two properties is highly desirable but hard to achieve. Conceptually, a possible solution to this problem would be encapsulating the magnetic particles but keeping them free to rotate inside a capsule with constant interparticle distances and thus shielded from changes in the viscosity of the surrounding media. Here we present an example of such materials by the encapsulation of magnetic ferrofluids into highly hydrophobic silica, leading to the formation of dry ferrofluids, i.e., a material behaving macroscopically as a dry powder but locally as a ferrofluid where magnetic nanoparticles are free to rotate in the liquid.

Graphical abstract: Magnetically responsive dry fluids

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Article information

DOI
https://doi.org/10.1039/C3NR01784B
Article type
Communication
Submitted
09 Apr 2013
Accepted
19 Jun 2013
First published
20 Jun 2013

Nanoscale, 2013,5, 7229-7233

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Magnetically responsive dry fluids

F. L. Sousa, R. Bustamante, A. Millán, F. Palacio, T. Trindade and N. J. O. Silva, Nanoscale, 2013, 5, 7229 DOI: 10.1039/C3NR01784B

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