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Comparative study on CoFe_2O_4 ultrafineparticles in liquid and dry specimens of the acidic water-based ferrofluids by STM |
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| Authors: | DAI Da-lin LI Jian WEN Yi DAI Yi-ling ZHANG Wen-shong CHENG Xin-yong |
| Affiliation: | 1. Dept of Life Sci and +Physics Dept, Southwest China Normal Univ, 2. College of Life Science, Lanzhou University, 3. Applied Physics Department of Chongqing University, |
| Abstract: | In the acidic water based ferro fluids, the ultra-fine particles appeared in a form of spheres with a diameter in a range of 2～6nm. The poly-groups of CoFe2O4 ultrafineparticles are divided into two species, i.e. the weak poly-group and strong poly-group, based on the resoluble degree of these ultrafineparticles that aggregate into the groups observed by STM. The ultra-fine particles formed at the liquid and dry specimens have different ratio of two species |
| Keywords: | ferrofluids ultra fine particles acidic water based CoFe 2O 4 liquid STM |
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