Stokes and anti-Stokes blue light emissions of thermal-evaporated silica sub-micron wires

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	Stokes and anti-Stokes blue light emissions of thermal-evaporated silica sub-micron wires
	C. Y. Tao; X. M. Li; W. L. Feng; J. C. Yang; W. L. Li; Y. F. Li; W. J. Yang
	2011
发表期刊	Physica Status Solidi a-Applications and Materials Science
ISSN	1862-6300
卷号	208 期号:2 页码:466-470
摘要	Based on the thermal evaporation of silicon monoxide at high temperature, an improved method has been developed for large-scale synthesis of ultralong amorphous silica sub-micron wires using polished p-Si wafers as substrates. The synthesis was done with and without thermite. The morphology and structure of the silica wires was investigated through field-emission scanning electron microscope equipped with energy dispersive X-ray spectroscopy, and X-ray diffractometer. Almost uniform sub-micron wires with average diameters of 300 nm and length up to hundreds of micrometers were obtained in presence of thermite while sub-micron wires with many curved segments were obtained in absence of the thermite. Both forms of silica wires emitted blue lights at 478 nm (similar to 2.6 eV) under excitation at 351 nm (similar to 3.5 eV), while intense anti-Stokes blue emissions at 464 nm(similar to 2.7 eV) were observed under the 694 nm(similar to 1.8 eV) excitation due to the upconversion effect. This effect is associated with defect centers arising from high oxygen deficiency. The emissions from oxygen deficiency centers might be caused by multistep energy transfer from nonbridging oxygen hole centers to oxygen deficiency centers. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
部门归属	[tao, chuanyi; li, xueming; yang, jianchun; li, wulin; li, yongfu] chongqing univ, coll optoelect engn, chongqing 400030, peoples r china. [li, xueming; yang, wenjing] chongqing univ, coll chem & chem engn, chongqing 400030, peoples r china. [feng, wenlin] chongqing univ technol, dept appl phys, chongqing 400054, peoples r china. [feng, wenlin] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;li, xm (reprint author), chongqing univ, coll optoelect engn, chongqing 400030, peoples r china;xuemingli@cqu.edu.cn
关键词	Nanowires Photoluminescence Silica Thermal Evaporation Upconversion Transfer Up-conversion Photoluminescence Properties Nanowire Growth Deposition Mechanism Pressure Dioxide Centers Lasers
URL	查看原文
WOS记录号	WOS:000288087100025
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30707
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Y. Tao,X. M. Li,W. L. Feng,et al. Stokes and anti-Stokes blue light emissions of thermal-evaporated silica sub-micron wires[J]. Physica Status Solidi a-Applications and Materials Science,2011,208(2):466-470.
APA	C. Y. Tao.,X. M. Li.,W. L. Feng.,J. C. Yang.,W. L. Li.,...&W. J. Yang.(2011).Stokes and anti-Stokes blue light emissions of thermal-evaporated silica sub-micron wires.Physica Status Solidi a-Applications and Materials Science,208(2),466-470.
MLA	C. Y. Tao,et al."Stokes and anti-Stokes blue light emissions of thermal-evaporated silica sub-micron wires".Physica Status Solidi a-Applications and Materials Science 208.2(2011):466-470.

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