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Title: Magnetically responsive dry fluids
Author: Sousa, Filipa L.
Bustamante, Rodney
Millan, Angel
Palacio, Fernando
Trindade, Tito
Silva, Nuno J. O.
Keywords: WATER
Issue Date: 2013
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.
Peer review: yes
DOI: 10.1039/c3nr01784b
ISSN: 2040-3364
Publisher Version: 10.1039/c3nr01784b
Appears in Collections:CICECO - Artigos

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