期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 6, 页码 2560-2565出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm14569j
关键词
-
资金
- National Basic Research Program of China [2009CB939901]
- National Nature Science Foundation [90922016, 10979047, 11079004]
We report the first observation of nanorings coiled by nanobelts in our synthesized Na2V6O16 center dot 3H(2)O (Barnesite) sample by a simple and novel cost-effective low-temperature hydrothermal method, and also find room temperature ferromagnetism in the product for the first time. The Na2V6O16 center dot 3H(2)O samples are characterized by XRD, SEM and XPS to ascertain their structure, morphology and composition. They exhibit ferromagnetic properties with coercivity of 400 Oe at 300 K observed from a hysteresis loop. The XPS spectra, and the hysteresis loops of the sample before and after annealing both demonstrate that the origin of ferromagnetism in the Na2V6O16 center dot 3H(2)O product is attributed to the introduction of oxygen vacancies. The polarization-induced self-coiling of in situ formed Na2V6O16 center dot 3H(2)O nanobelts is responsible for the formation of the perfectly circular nanoring geometry and it may be useful to investigate polar surface-induced growth processes, fundamental physics phenomena, and the design for nanoscale devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据