Electronic structure of cluster assembled nanostructured TiO2 by resonant photoemission at the Ti L2,3 edge

被引：29

作者：

Caruso, T. ^{[1
]}

Lenardi, C. ^{[2
,7
]}

Agostino, R. G. ^{[1
]}

Amati, M. ^{[3
,7
]}

Bongiorno, G. ^{[3
,7
]}

Mazza, T. ^{[3
,7
]}

Policicchio, A. ^{[1
]}

Formoso, V. ^{[1
]}

Maccallini, E. ^{[1
]}

Colavita, E. ^{[1
]}

Chiarello, G. ^{[1
]}

Finetti, P. ^{[4
]}

Sutara, F. ^{[5
]}

Skala, T. ^{[5
]}

Piseri, P. ^{[3
,7
]}

Prince, K. C. ^{[6
]}

Milani, P. ^{[3
,7
]}

机构：

[1] Univ Calabria, CNISM, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy

[2] Univ Milan, Ist Fisiol Gen & Chem Biol, I-20134 Milan, Italy

[3] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[4] Univ Padua, Dipartimento Sci Chim, I-35131 Padua, Italy

[5] Charles Univ Prague, Dept Surface & Plasma Sci, Fac Math & Phys, CR-18000 Prague 8, Czech Republic

[6] Sincrotrone Trieste, I-34012 Trieste, Italy

[7] Univ Milan, CIMAINA Ctr Interdisciplinaire Mat & Interfacce N, I-20133 Milan, Italy

来源：

JOURNAL OF CHEMICAL PHYSICS | 2008年 / 128卷 / 09期

关键词：

D O I：

10.1063/1.2832321

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electronic structure of cluster assembled nanostructured TiO(2) thin films has been investigated by resonant photoemission experiments with photon energies across the Ti L(2,3) edge. The samples were produced by supersonic cluster beam deposition with a pulsed microplasma cluster source. The valence band shows resonance enhancements in the binding energy region between 4 and 8 eV, populated by O 2p and hybridized Ti 3d states, and in the region about 1 eV below the Fermi level associated with defects related Ti 3d states. The data show that in as-deposited films Ti atoms are mainly fully (sixfolds) coordinated to oxygen atoms in octahedral symmetry and only a small fraction is in a broken symmetry environment. Since resonant photoemission is closely linked to the local electronic and structural configurations around the Ti atom, it is possible to correlate the resonant photoemission intensity and lineshape with the presence of defects of the films and with the degree of hybridization between the titanium and oxygen atoms. (C) 2008 American Institute of Physics.

引用

页数：8

共 43 条

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