Magnetic Microemulsions as Tunable Nanomagnets
Control of sub-micron sized particles is of increasing interest as there is clear evidence that small atomic clusters (n = 10-1000 atoms) exhibit novel hybrid properties between the molecular and bulk solid-state limits. Through SANS and SQUID magnetometry we recently showed that quantum effects can be observed in nanoparticle-free ferrofluids through the design of magnetic micelles and microemulsions from magneto-surfactants1. Such systems bridge the gap between molecular nanomagnets (n <30) and magnetic nanoparticles (MNPs) (n = 100-1000)2, allowing controlled values of n and combining magnetic ordering with properties such as low-density, and electric insulation. This is a significant step forward as the advantage of employing these microemulsions over nanoparticle containing ferrofluids is in situ tunability through careful control of surfactant type, mixture ratio, and composite volume fractions: the proposal aims to explore this tunability.
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EASTOE Julian; ALEXANDER Shirin; BROWN Paul; GRILLO Isabelle; JAMES Craig; NAVARRO Miguel; Gregory N. Smith and YAN Ci. (2013). Magnetic Microemulsions as Tunable Nanomagnets. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1317
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