期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 548, 期 -, 页码 222-227出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.09.016
关键词
Nanostructured materials; Oxide materials; Precipitation; Point defects; Electron paramagnetic resonance; Thermal analysis
资金
- CNCSIS - UEFISCSU [PNII-IDEI-74/2011]
- ANCS [PN09-45]
Trace amounts of substitutional Mn2+ ions and shallow donors magnetic centers were identified by electron paramagnetic resonance (EPR) in crystalline Zn(OH)(2) prepared by precipitation of a Zn-nitrate solution with NaOH. Strong changes in the Mn2+ ions spectrum, as well as a sharp increase in the concentration of the shallow donor centers were observed by EPR in the 110-140 degrees C temperature range, during pulse annealing experiments in air up to 240 degrees C. They reflect the decomposition of the crystalline Zn(OH)(2) host lattice into nanocrystalline ZnO, confirmed by X-ray diffraction and thermal analysis measurements. Accurate spin Hamiltonian parameters of the observed paramagnetic centers were determined by lineshape simulation and fitting of the EPR spectra, to be used as reference data in further studies of nanocrystalline systems involving Zn(OH)(2). (C) 2012 Elsevier B.V. All rights reserved.
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