Photoinduced reversible lattice expansion in W-doped TiO2 through the change of its electronic structure

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	Photoinduced reversible lattice expansion in W-doped TiO2 through the change of its electronic structure
	Feng, F; Yang, WY; Gao, S; Zhu, LG; Li, Q; Li, Q (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Environm Funct Mat Div, Shenyang 110016, Liaoning, Peoples R China.
刊名	APPLIED PHYSICS LETTERS
	2018-02-05
卷号	112 期号:6 页码:-
关键词	Total-energy Calculations Effective Ionic-radii Wave Basis-set Nanotube Arrays Actuators Nitrogen Photochromism Performance Oxidation Dynamics
ISSN号	0003-6951
英文摘要	External stimulations of applied force or voltage have been reported to induce crystal lattice dimension changes with the order of 0.1% or above by imposing external mechanical or electric forces on atoms forming the lattice for various types of materials, including oxides, metals, polymers, and carbon nanostructures. As far as we know, however, no report is available for similar level changes in oxides from their internal electronic structure changes induced by photoirradiation. We show that reversible lattice expansion comparable to those by applied force or voltage can be induced by UV-irradiation on an oxide of W-doped TiO2 nanotubes through the reversible changes of its internal electronic structure by the accumulation and release of photogenerated electrons in W-dopants when UV-illumination is on and off. This photoirradiation-induced reversible lattice expansion and subsequent optical, electric, and magnetic property changes may also be present in other material systems by proper material design if they possess one component that is able to produce electrons upon photoirradiation and the other component that is able to accumulate photogenerated electrons to induce lattice changes and release them after the photoirradiation is off. Published by AIP Publishing.; External stimulations of applied force or voltage have been reported to induce crystal lattice dimension changes with the order of 0.1% or above by imposing external mechanical or electric forces on atoms forming the lattice for various types of materials, including oxides, metals, polymers, and carbon nanostructures. As far as we know, however, no report is available for similar level changes in oxides from their internal electronic structure changes induced by photoirradiation. We show that reversible lattice expansion comparable to those by applied force or voltage can be induced by UV-irradiation on an oxide of W-doped TiO2 nanotubes through the reversible changes of its internal electronic structure by the accumulation and release of photogenerated electrons in W-dopants when UV-illumination is on and off. This photoirradiation-induced reversible lattice expansion and subsequent optical, electric, and magnetic property changes may also be present in other material systems by proper material design if they possess one component that is able to produce electrons upon photoirradiation and the other component that is able to accumulate photogenerated electrons to induce lattice changes and release them after the photoirradiation is off. Published by AIP Publishing.
学科主题	Physics, Applied
语种	英语
资助机构	National Natural Science Foundation of China [51672283, 51602316]; Basic Science Innovation Program of Shenyang National Laboratory for Materials Science [Y4N56R1161, Y5N56F2161]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79522]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Q (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Environm Funct Mat Div, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Feng, F,Yang, WY,Gao, S,et al. Photoinduced reversible lattice expansion in W-doped TiO2 through the change of its electronic structure[J]. APPLIED PHYSICS LETTERS,2018,112(6):-.
APA	Feng, F,Yang, WY,Gao, S,Zhu, LG,Li, Q,&Li, Q .(2018).Photoinduced reversible lattice expansion in W-doped TiO2 through the change of its electronic structure.APPLIED PHYSICS LETTERS,112(6),-.
MLA	Feng, F,et al."Photoinduced reversible lattice expansion in W-doped TiO2 through the change of its electronic structure".APPLIED PHYSICS LETTERS 112.6(2018):-.