| Controllable synthesis and magnetism of iron oxides nanorings | |
| Lv, Baoliang1,2; Xu, Yao1; Gao, Qiang1,2; Wu, Dong1; Sun, Yuhan1 | |
| 刊名 | Journal of nanoscience and nanotechnology
 |
| 2010-04-01 | |
| 卷号 | 10期号:4页码:2348-2359 |
| 关键词 | Iron oxide Nanorings Magnetic property Coercivity |
| ISSN号 | 1533-4880 |
| DOI | 10.1166/jnn.2010.2161 |
| 通讯作者 | Xu, yao() |
| 英文摘要 | Hematite (alpha-fe(2)o(3)) nanorings were prepared via a facile hydrothermal route without using any template. the products were characterized by x-ray powder diffraction (xrd), x-ray photoelectron spectroscopy (xps), scanning electron microscopy (sem), and transmission electron microscopy (tem). on the basis of these characterizations and condition experiments, an "oriented dissolution and recrystallization" mechanism under the effect of h(2)po(4)(-) ions was proposed to explain the formation process of nanoring structure. magnetite (fe(3)o(4)) nanorings were obtained by reducing alpha-fe(2)o(3) nanorings, and then maghemite (gamma-fe(2)o(3)) nanorings were obtained by reoxidizing fe(3)o(4) nanorings. the magnetic properties of these nanorings were investigated, and it was found that these nanorings have higher coercivity and lower saturation magnetization than many other nanostructures of iron oxides. the adsorbed phosphate on the surface and the nanoring morphology might be responsible for this phenomenon. furthermore, it is interesting to find that the coercjvity of the nanorings increased with the increase of d(in)/d(out) (d(in) and d(out) are the inner and outer diameters of the rings, respectively), and a rapid increase was observed at the value of d(in)/d(out) around 0.5. |
| WOS关键词 | LARGE-SCALE SYNTHESIS ; MAGHEMITE NANOPARTICLES ; HEMATITE NANOPARTICLES ; LOW-TEMPERATURE ; CRYSTALLINE WALLS ; FLUX-CLOSURE ; ALPHA-FE2O3 ; RINGS ; GAMMA-FE2O3 ; FE3O4 |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| WOS类目 | Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| 语种 | 英语 |
| 出版者 | AMER SCIENTIFIC PUBLISHERS |
| WOS记录号 | WOS:000273984900011 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2408604 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Xu, Yao |
| 作者单位 | 1.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lv, Baoliang,Xu, Yao,Gao, Qiang,et al. Controllable synthesis and magnetism of iron oxides nanorings[J]. Journal of nanoscience and nanotechnology,2010,10(4):2348-2359. |
| APA | Lv, Baoliang,Xu, Yao,Gao, Qiang,Wu, Dong,&Sun, Yuhan.(2010).Controllable synthesis and magnetism of iron oxides nanorings.Journal of nanoscience and nanotechnology,10(4),2348-2359. |
| MLA | Lv, Baoliang,et al."Controllable synthesis and magnetism of iron oxides nanorings".Journal of nanoscience and nanotechnology 10.4(2010):2348-2359. |
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