期刊
LANGMUIR
卷 26, 期 9, 页码 6145-6148出版社
AMER CHEMICAL SOC
DOI: 10.1021/la1006617
关键词
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资金
- Centers for Materials Research Science and Engineering [DMR-0213695]
- Hierarchical Manufacturing [CMMI-0531171]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [820506] Funding Source: National Science Foundation
Ferrofluids based on oleate-stabilized nanoparticulate magnetite in cyclic olefin carrier solvents were prepared. Puddles of fluids containing 20-70 wt% magnetite in 1,5-cyclooctadiene or dicyclopentadiene can he moved or positioned on surfaces or in vessels with moderate magnetic fields (inexpensive NdFeB magnets). The surfaces of puddles with concentrations >40 wt% distort in response to magnetic fields applied perpendicular to the puddle surface and exhibit pointed liquid asperities. The liquid surface topography (asperity height and number per unit area) can he controlled by the strength of the applied field. The cyclic olefin carriers can be polymerized by ring-opening metathesis, solidifying the ferrofluid samples in the shape of the magnetically distorted monomeric solvent suspensions.
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