期刊
ACS APPLIED MATERIALS & INTERFACES
卷 3, 期 3, 页码 662-667出版社
AMER CHEMICAL SOC
DOI: 10.1021/am1012112
关键词
ferrofluid; ionic liquid; steric stabilization; nanoparticle; dispersion; solvation
资金
- Australian Research Council
- Dyno Nobel Asia Pacific Limited
- Sirtex Medical Limited
Ionic liquid ferrofluids have been prepared containing both bare and sterically stabilized 8-12 nm diameter superparamagnetic iron oxide nanoparticles, which remain stable for several months in both protic ethylammonium and aprotic imidazolium room temperature ionic liquids. These ferrofluids exhibit spiking in static magnetic fields similar to conventional aqueous and nonaqueous ferrofluids. Ferrofluid stability was verified by following the flocculation and settling behavior of dilute nanoparticle dispersions. Although bare nanoparticles showed excellent stability in some ILs, they were unstable in others, and exhibited limited water tolerance. Stability was achieved by incorporating a thin polymeric steric stabilization layer designed to be compatible with the IL. This confers the added benefit of imbuing the ILF with a high tolerance to water.
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