The influence of metal interlayers on the structural and optical properties of nano-crystalline TiO                         2                          films

Y. Yang; Q. Zhang; B. Zhang; W. B. Mi; L. Chen; L. Li; C. Zhao; E. M. Diallo; X. X. Zhang

doi:10.1016/j.apsusc.2012.01.020

The influence of metal interlayers on the structural and optical properties of nano-crystalline TiO ₂ films

Y. Yang, Q. Zhang, B. Zhang, W. B. Mi, L. Chen, L. Li, C. Zhao, E. M. Diallo, X. X. Zhang

Core Technology Platforms

Research output: Contribution to journal › Article › peer-review

Abstract

TiO ₂ -M-TiO ₂ (M = W, Co and Ag) multilayer films have been deposited on glass substrates using reactive magnetron sputtering, then annealed in air for 2 h at 500°C. The structure, surface morphology and optical properties of the films have been studied using X-ray diffraction, Raman spectroscopy, atomic force microscopy and UV-vis spectroscopy. The TiO ₂ -W-TiO ₂ and TiO ₂ -Co-TiO ₂ films showed crystalline phases, whereas the TiO ₂ -Ag-TiO ₂ films remained in the amorphous state. The crystallization temperature for the TiO ₂ -M-TiO ₂ films decreased significantly compared with pure TiO ₂ film deposited on quartz. Detailed analysis of the Raman spectra suggested that the crystallization of TiO ₂ -M-TiO ₂ films was associated with the large structural deformation imposed by the oxidation of intermediate metal layers. Moreover, the optical band gap of the films narrowed due to the appearance of impurity levels as the metal ions migrated into the TiO ₂ matrix. These results indicate that the insertion of intermediate metal layers provides a feasible access to improve the structural and optical properties of anatase TiO ₂ films, leading to promising applications in the field of photocatalysis.

Original language	English (US)
Pages (from-to)	4532-4537
Number of pages	6
Journal	Applied Surface Science
Volume	258
Issue number	10
DOIs	https://doi.org/10.1016/j.apsusc.2012.01.020
State	Published - Mar 1 2012

Keywords

Anatase
Annealing
Atomic force microscopy
Multilayer
Nanocrystalline
Raman spectroscopy
UV-vis spectroscopy
X-ray diffraction

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Physics and Astronomy(all)
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1016/j.apsusc.2012.01.020

Cite this

Yang, Y., Zhang, Q., Zhang, B., Mi, W. B., Chen, L., Li, L., Zhao, C., Diallo, E. M., & Zhang, X. X. (2012). The influence of metal interlayers on the structural and optical properties of nano-crystalline TiO ₂ films Applied Surface Science, 258(10), 4532-4537. https://doi.org/10.1016/j.apsusc.2012.01.020

The influence of metal interlayers on the structural and optical properties of nano-crystalline TiO ₂ films . / Yang, Y.; Zhang, Q.; Zhang, B. et al.
In: Applied Surface Science, Vol. 258, No. 10, 01.03.2012, p. 4532-4537.

Research output: Contribution to journal › Article › peer-review

Yang, Y, Zhang, Q, Zhang, B, Mi, WB, Chen, L, Li, L, Zhao, C, Diallo, EM & Zhang, XX 2012, ' The influence of metal interlayers on the structural and optical properties of nano-crystalline TiO ₂ films ', Applied Surface Science, vol. 258, no. 10, pp. 4532-4537. https://doi.org/10.1016/j.apsusc.2012.01.020

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title = " The influence of metal interlayers on the structural and optical properties of nano-crystalline TiO 2 films ",

abstract = " TiO 2 -M-TiO 2 (M = W, Co and Ag) multilayer films have been deposited on glass substrates using reactive magnetron sputtering, then annealed in air for 2 h at 500°C. The structure, surface morphology and optical properties of the films have been studied using X-ray diffraction, Raman spectroscopy, atomic force microscopy and UV-vis spectroscopy. The TiO 2 -W-TiO 2 and TiO 2 -Co-TiO 2 films showed crystalline phases, whereas the TiO 2 -Ag-TiO 2 films remained in the amorphous state. The crystallization temperature for the TiO 2 -M-TiO 2 films decreased significantly compared with pure TiO 2 film deposited on quartz. Detailed analysis of the Raman spectra suggested that the crystallization of TiO 2 -M-TiO 2 films was associated with the large structural deformation imposed by the oxidation of intermediate metal layers. Moreover, the optical band gap of the films narrowed due to the appearance of impurity levels as the metal ions migrated into the TiO 2 matrix. These results indicate that the insertion of intermediate metal layers provides a feasible access to improve the structural and optical properties of anatase TiO 2 films, leading to promising applications in the field of photocatalysis.",

keywords = "Anatase, Annealing, Atomic force microscopy, Multilayer, Nanocrystalline, Raman spectroscopy, UV-vis spectroscopy, X-ray diffraction",

author = "Y. Yang and Q. Zhang and B. Zhang and Mi, {W. B.} and L. Chen and L. Li and C. Zhao and Diallo, {E. M.} and Zhang, {X. X.}",

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AU - Li, L.

AU - Zhao, C.

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N2 - TiO 2 -M-TiO 2 (M = W, Co and Ag) multilayer films have been deposited on glass substrates using reactive magnetron sputtering, then annealed in air for 2 h at 500°C. The structure, surface morphology and optical properties of the films have been studied using X-ray diffraction, Raman spectroscopy, atomic force microscopy and UV-vis spectroscopy. The TiO 2 -W-TiO 2 and TiO 2 -Co-TiO 2 films showed crystalline phases, whereas the TiO 2 -Ag-TiO 2 films remained in the amorphous state. The crystallization temperature for the TiO 2 -M-TiO 2 films decreased significantly compared with pure TiO 2 film deposited on quartz. Detailed analysis of the Raman spectra suggested that the crystallization of TiO 2 -M-TiO 2 films was associated with the large structural deformation imposed by the oxidation of intermediate metal layers. Moreover, the optical band gap of the films narrowed due to the appearance of impurity levels as the metal ions migrated into the TiO 2 matrix. These results indicate that the insertion of intermediate metal layers provides a feasible access to improve the structural and optical properties of anatase TiO 2 films, leading to promising applications in the field of photocatalysis.

AB - TiO 2 -M-TiO 2 (M = W, Co and Ag) multilayer films have been deposited on glass substrates using reactive magnetron sputtering, then annealed in air for 2 h at 500°C. The structure, surface morphology and optical properties of the films have been studied using X-ray diffraction, Raman spectroscopy, atomic force microscopy and UV-vis spectroscopy. The TiO 2 -W-TiO 2 and TiO 2 -Co-TiO 2 films showed crystalline phases, whereas the TiO 2 -Ag-TiO 2 films remained in the amorphous state. The crystallization temperature for the TiO 2 -M-TiO 2 films decreased significantly compared with pure TiO 2 film deposited on quartz. Detailed analysis of the Raman spectra suggested that the crystallization of TiO 2 -M-TiO 2 films was associated with the large structural deformation imposed by the oxidation of intermediate metal layers. Moreover, the optical band gap of the films narrowed due to the appearance of impurity levels as the metal ions migrated into the TiO 2 matrix. These results indicate that the insertion of intermediate metal layers provides a feasible access to improve the structural and optical properties of anatase TiO 2 films, leading to promising applications in the field of photocatalysis.

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