Effect of size on momentum distribution of electrons around vacancies in NiO nanoparticles

Effect of size on momentum distribution of electrons around vacancies in NiO nanoparticles

Anjan Dasa;Atis Chandra Mandal;P. M. G. Nambissan

【期刊名称】《中国物理：英文版》 【年(卷),期】2015(000)004

【摘要】Very small nickel oxide nanoparticles were prepared by a sol–gel procedure using nickel nitrate hexahydrate and ammonium hydroxide as precursors. The particles are in the range of 5 nm–11 nm. The x-ray diffraction (XRD) crys-tallography and high resolution transmission electron microscopy (HRTEM) were employed to characterize the samples. They were found to be polycrystalline in nature and fcc (NaCl-type) in structure, with the lattice parameter varying with annealing temperature. HRTEM pictures show that the as-prepared samples are hexagonal in shape. Positron annihilation spectroscopy was used to investigate the Doppler-broadened spectra of the samples. The S and W parameters revealed that the chemical surroundings and momentum distribution of the vacancy clusters vary with crystallite size. 【总页数】4页(1-4) 【关键词】

【作者】Anjan Dasa;Atis Chandra Mandal;P. M. G. Nambissan

【作者单位】Department of Physics, A.P.C. Roy Government College,

Siliguri, Darjeeling 734010, West Bengal, India;Department of Physics, University of Burdwan, Golapbag, Burdwan 713104, West Bengal, India;Applied Nuclear Physics Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India 【正文语种】英文 【中图分类】 【文献来源】

https://www.zhangqiaokeyan.com/academic-journal-cn_chinese-physics-b_thesis/0201251220440.html 【相关文献】

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