Electron-Beam-Induced Growth of TiO2 Nanostructures

被引：2

作者：

Chee, See Wee ^{[1
]}

Sivaramakrishnan, Shankar ^{[2
]}

Sharma, Renu ^{[3
,4
]}

Zuo, Jian-Min ^{[2
]}

机构：

[1] Arizona State Univ, LeRoy Eyring Ctr Solid State Sci, Tempe, AZ 85287 USA

[2] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[3] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA

[4] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA

来源：

MICROSCOPY AND MICROANALYSIS | 2011年 / 17卷 / 02期

关键词：

titanium dioxide; nanostructures; in situ electron microscopy; electron-beam-induced effects; METAL OXIDE SURFACES; THERMAL EVAPORATION; TITANIUM-DIOXIDE; RUTILE TIO2; NANOWIRES; NANOMATERIALS; MECHANISM;

D O I：

10.1017/S1431927610094420

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the evolution of titanium dioxide nanostructures when Au nanoparticles, supported on single crystal TiO2 substrates, were heated under; similar to 260 Pa of flowing O-2 in an environmental transmission electron microscope. Nanostructures with different morphologies were first observed around 500 degrees C. Our measurements show that temperature, oxygen pressure, and the electron beam control the nanostructure growth. We propose a reaction-controlled growth mechanism where mobile Ti atoms generated by the electron-beam-induced reduction of TiO2 are preferentially reoxidized at the Au-TiO2 interface.

引用

页码：274 / 278

页数：5

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