Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing

Onah D. U.; Ugwu E. I.; Ekpe J. E.

doi:doi:10.11648/j.nano.20150303.15

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Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing

Onah D. U., Ugwu E. I., Ekpe J. E.

Published in American Journal of Nano Research and Applications (Volume 3, Issue 3)

Received: 24 February 2015 Accepted: 22 April 2015 Published: 11 May 2015

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Abstract

The optical properties of TiO2/CuO core-shell thin films were studied after the as-deposited nanocrystalline core-shell thin films were annealed at different temperatures [373K – 673K]. Orthorhombic nanocrystalline structure induced by thermal annealing for the films as confirmed by XRD analysis was observed. The optical properties were obtained from the absorption and transmittance data in the range of 200- 1200nm. The increase in transmittance with increased wavelengths in UV region was not sharp. This indicated that the studied films have both direct and indirect transitions. Annealing was found to have more particular effect on the transmittance within the UV window. The band gaps of the film samples ranged within 1.2eV and 3.7eV to 4.0eV.

Published in	American Journal of Nano Research and Applications (Volume 3, Issue 3)
DOI	10.11648/j.nano.20150303.15
Page(s)	62-65
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

Tio2/Cuo, Direct and Indirect Transitions, Uv Transmittance, Annealing, Band Gap

References

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[3]	M. Hidaka, R.P. Wijesundera, K. Koga, M. Sakai and Siripala, W. [2006]. Growth and characterization of potentiostatically electrodoposited CuO and Cu thin films, Thin Solid Films, 500, 214.
[4]	C.I. Chu and H.C. Lu [2009]. Physical properties of copper oxide thin films prepared by dc reaction magnetron sputtering under different oxygen partial pressures, Internal Nuclear Information System [INIS], 5, 100.
[5]	V.D. Patake, S.S. Joshi and L.O. Khande [2009]. Electrodeposited porous and amorphous copper oxide film for application in supercapacitor, International Nuclear Information System [INIS], 6, 23.
[6]	M. Bozorgtabar, M. Rahimipour, M. Salehi and M. Jafarpour [2011]. The Photo-Absorption and Surface Feature of Nano-structured TiO2 coatings, Journal of World Academy of Science, Engineering and Technology, 56, 346.
[7]	E. Vigil, L. Saadoun, J.A. Ayllon, X. Domènech, I. Zumeta and R. Rodriguez-Clemente [2000]. TiO2 thin film deposition from solution using microwave heating, Thin Solid Films, 365, 12.
[8]	Dakka, J. Lafait, M. Abd-Lefdil and C. Sella [1999]. Optical study of titanium dioxide thin films prepared by R.F. Sputtering, Moroccan Journal of Condensed Matter, 2, [1]: 153.
[9]	E. Ritter [1975]. Dielectric film materials for optical applications. Phys. Thin Films, 8, 1.
[10]	D. Mardare and G.I. Rusu [2000]. On the structure of Titanium oxide thin films. http://stoner.phys.uaic.ro
[11]	W. Siripala, L.D.R.D. Perero, K.T.L. De Silva, J.K.D.S. Jayanetti and L.M. Dharmadasa [1996]. Study of annealing effects of cuprous oxide grown by electrodeposition technique. Solar Energy Materials and Solar Cells, 44, 251.
[12]	A.U. Ubale, R.J. Dhokne, P.S. Chikhlikar, V.S. Sangawari and D.K. Kulkarni [2006]. Characterization of nanocrystalline cadmium telluride thin films grown by successive ionic layer adsorption and reaction [SILAR] method, Bull. Mater. Sci. 29, 2, 165.
[13]	F. Hisashi, I. Yoshihiro, N. Seiogo and N. Shigeru [2009]. Synthesis of High-K Titanum Oxide Thin Films formed by metal organic decomposition. Electrochem. Solid State Lett. 12, [5], E5.

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Onah D. U., Ugwu E. I., Ekpe J. E. (2015). Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing. American Journal of Nano Research and Applications, 3(3), 62-65. https://doi.org/10.11648/j.nano.20150303.15

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ACS Style

Onah D. U.; Ugwu E. I.; Ekpe J. E. Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing. Am. J. Nano Res. Appl. 2015, 3(3), 62-65. doi: 10.11648/j.nano.20150303.15

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AMA Style

Onah D. U., Ugwu E. I., Ekpe J. E. Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing. Am J Nano Res Appl. 2015;3(3):62-65. doi: 10.11648/j.nano.20150303.15

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@article{10.11648/j.nano.20150303.15,
  author = {Onah D. U. and Ugwu E. I. and Ekpe J. E.},
  title = {Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing},
  journal = {American Journal of Nano Research and Applications},
  volume = {3},
  number = {3},
  pages = {62-65},
  doi = {10.11648/j.nano.20150303.15},
  url = {https://doi.org/10.11648/j.nano.20150303.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.nano.20150303.15},
  abstract = {The optical properties of TiO2/CuO core-shell thin films were studied after the as-deposited nanocrystalline core-shell thin films were annealed at different temperatures [373K – 673K]. Orthorhombic nanocrystalline structure induced by thermal annealing for the films as confirmed by XRD analysis was observed. The optical properties were obtained from the absorption and transmittance data in the range of 200- 1200nm. The increase in transmittance with increased wavelengths in UV region was not sharp. This indicated that the studied films have both direct and indirect transitions. Annealing was found to have more particular effect on the transmittance within the UV window. The band gaps of the film samples ranged within 1.2eV and 3.7eV to 4.0eV.},
 year = {2015}
}

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TY  - JOUR
T1  - Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing
AU  - Onah D. U.
AU  - Ugwu E. I.
AU  - Ekpe J. E.
Y1  - 2015/05/11
PY  - 2015
N1  - https://doi.org/10.11648/j.nano.20150303.15
DO  - 10.11648/j.nano.20150303.15
T2  - American Journal of Nano Research and Applications
JF  - American Journal of Nano Research and Applications
JO  - American Journal of Nano Research and Applications
SP  - 62
EP  - 65
PB  - Science Publishing Group
SN  - 2575-3738
UR  - https://doi.org/10.11648/j.nano.20150303.15
AB  - The optical properties of TiO2/CuO core-shell thin films were studied after the as-deposited nanocrystalline core-shell thin films were annealed at different temperatures [373K – 673K]. Orthorhombic nanocrystalline structure induced by thermal annealing for the films as confirmed by XRD analysis was observed. The optical properties were obtained from the absorption and transmittance data in the range of 200- 1200nm. The increase in transmittance with increased wavelengths in UV region was not sharp. This indicated that the studied films have both direct and indirect transitions. Annealing was found to have more particular effect on the transmittance within the UV window. The band gaps of the film samples ranged within 1.2eV and 3.7eV to 4.0eV.
VL  - 3
IS  - 3
ER  -

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Author Information

Onah D. U.

Department of Industrial Physics, Ebonyi State University, Abakaliki, Nigeria
Ugwu E. I.

Department of Industrial Physics, Ebonyi State University, Abakaliki, Nigeria
Ekpe J. E.

Department of Industrial Physics, Ebonyi State University, Abakaliki, Nigeria

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APA Style

Onah D. U., Ugwu E. I., Ekpe J. E. (2015). Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing. American Journal of Nano Research and Applications, 3(3), 62-65. https://doi.org/10.11648/j.nano.20150303.15

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ACS Style

Onah D. U.; Ugwu E. I.; Ekpe J. E. Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing. Am. J. Nano Res. Appl. 2015, 3(3), 62-65. doi: 10.11648/j.nano.20150303.15

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AMA Style

Onah D. U., Ugwu E. I., Ekpe J. E. Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing. Am J Nano Res Appl. 2015;3(3):62-65. doi: 10.11648/j.nano.20150303.15

Copy | Download

@article{10.11648/j.nano.20150303.15,
  author = {Onah D. U. and Ugwu E. I. and Ekpe J. E.},
  title = {Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing},
  journal = {American Journal of Nano Research and Applications},
  volume = {3},
  number = {3},
  pages = {62-65},
  doi = {10.11648/j.nano.20150303.15},
  url = {https://doi.org/10.11648/j.nano.20150303.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.nano.20150303.15},
  abstract = {The optical properties of TiO2/CuO core-shell thin films were studied after the as-deposited nanocrystalline core-shell thin films were annealed at different temperatures [373K – 673K]. Orthorhombic nanocrystalline structure induced by thermal annealing for the films as confirmed by XRD analysis was observed. The optical properties were obtained from the absorption and transmittance data in the range of 200- 1200nm. The increase in transmittance with increased wavelengths in UV region was not sharp. This indicated that the studied films have both direct and indirect transitions. Annealing was found to have more particular effect on the transmittance within the UV window. The band gaps of the film samples ranged within 1.2eV and 3.7eV to 4.0eV.},
 year = {2015}
}

Copy | Download

TY  - JOUR
T1  - Optical Properties of Nanocrystalline TiO2/CuO Core-Shell Thin Films by Thermal Annealing
AU  - Onah D. U.
AU  - Ugwu E. I.
AU  - Ekpe J. E.
Y1  - 2015/05/11
PY  - 2015
N1  - https://doi.org/10.11648/j.nano.20150303.15
DO  - 10.11648/j.nano.20150303.15
T2  - American Journal of Nano Research and Applications
JF  - American Journal of Nano Research and Applications
JO  - American Journal of Nano Research and Applications
SP  - 62
EP  - 65
PB  - Science Publishing Group
SN  - 2575-3738
UR  - https://doi.org/10.11648/j.nano.20150303.15
AB  - The optical properties of TiO2/CuO core-shell thin films were studied after the as-deposited nanocrystalline core-shell thin films were annealed at different temperatures [373K – 673K]. Orthorhombic nanocrystalline structure induced by thermal annealing for the films as confirmed by XRD analysis was observed. The optical properties were obtained from the absorption and transmittance data in the range of 200- 1200nm. The increase in transmittance with increased wavelengths in UV region was not sharp. This indicated that the studied films have both direct and indirect transitions. Annealing was found to have more particular effect on the transmittance within the UV window. The band gaps of the film samples ranged within 1.2eV and 3.7eV to 4.0eV.
VL  - 3
IS  - 3
ER  -

Copy | Download