Size Dependent Physical Properties of Nanostructured α-Fe2O3 Thin Films Grown by Successive Ionic Layer Adsorption and Reaction Method for Antibacterial Application

doi:10.1016/j.jmst.2014.11.011

J. Mater. Sci. Technol. ›› 2015, Vol. 31 ›› Issue (1): 1-9.DOI: 10.1016/j.jmst.2014.11.011

• 论文 • 下一篇

收稿日期:2014-04-08 出版日期:2015-01-20 发布日期:2015-07-23

Size Dependent Physical Properties of Nanostructured α-Fe₂O₃ Thin Films Grown by Successive Ionic Layer Adsorption and Reaction Method for Antibacterial Application

A.U. Ubale^{1, *}, M.R. Belkhedkar^{1, 2}

1 Nanostructured Thin Film Materials Laboratory, Department of Physics, Govt. Vidarbha Institute of Science and Humanities, VMV Road, Amravati 444604, Maharashtra, India; 2 Department of Physics, Shri Shivaji College, Akola 444003, Maharashtra, India

Received:2014-04-08 Online:2015-01-20 Published:2015-07-23
Contact: * Corresponding author. Ph.D.; Tel.: +91 721 2531706; Fax: +91 7212531705; E-mail address: ashokuu@yahoo.com (A.U. Ubale).
Supported by:
The authors are thankful to University Grants Commission, New Delhi (India), for financial support under the project.

摘要/Abstract

Abstract: Thin films of nanostructured α-Fe₂O₃ with thickness of 156, 203 and 251 nm were deposited by successive ionic layer adsorption and reaction (SILAR) method onto glass substrates using FeCl₃·6H₂O and NaOH as cationic and anionic precursors. The X-ray diffraction studies revealed that, α-Fe₂O₃ thin films are nanocrystalline in nature with rhombohedral structure. The morphological properties were investigated by field emission scanning electron and atomic force microscopy. The optical studies showed that α-Fe₂O₃ exhibits direct as well as indirect optical band gap energy. The electrical resistivity of α-Fe₂O₃ at 305 K decreases from 11.76 × 10² to 9.46 × 10² Ω cm as film thickness increases from 156 to 251 nm. The thermo-emf measurements confirmed that α-Fe₂O₃ exhibits n-type conductivity. The nanocrystalline α-Fe₂O₃ exhibits antibacterial character against Staphylococcus aureus and its efficiency increases from 37.50% to 87.50% depending on crystallite size.

Key words: Thin films, Nanostructures, AFM (atomic force microscopy), Physical properties, Antibacterial efficiency

. [J]. J. Mater. Sci. Technol., 2015, 31(1): 1-9.

A.U. Ubale, M.R. Belkhedkar. Size Dependent Physical Properties of Nanostructured α-Fe₂O₃ Thin Films Grown by Successive Ionic Layer Adsorption and Reaction Method for Antibacterial Application[J]. J. Mater. Sci. Technol., 2015, 31(1): 1-9.

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Size Dependent Physical Properties of Nanostructured α-Fe₂O₃ Thin Films Grown by Successive Ionic Layer Adsorption and Reaction Method for Antibacterial Application

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