Electronic structure of titania aerogels from soft x-ray absorption spectroscopy

被引：175

作者：

Kucheyev, SO ^{[1
]}

van Buuren, T ^{[1
]}

Baumann, TF ^{[1
]}

Satcher, JH ^{[1
]}

Willey, TM ^{[1
]}

Meulenberg, RW ^{[1
]}

Felter, TE ^{[1
]}

Poco, JF ^{[1
]}

Gammon, SA ^{[1
]}

Terminello, LJ ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.69.245102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic structure of TiO2 aerogels is studied by soft x-ray absorption near-edge structure (XANES) spectroscopy. High-resolution O K-edge and Ti L-2,L-3-edge XANES spectra of aerogels are compared with those of rutile, anatase, and unrelaxed amorphous phases of full-density TiO2. Results show that all the main spectroscopic features of aerogels, reflecting the element-specific partial density of empty electronic states and correlation effects, can be attributed to the absence of long-range order in stoichiometric amorphous TiO2. Based on these results, we discuss the effects of short- and long-range order on the electronic structure of TiO2.

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页码：245102 / 1

页数：7

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