Physical properties of Zn doped TiO2 thin films with spray pyrolysis technique and its effects in antibacterial activity

• Published in: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 138; pp. 105 - 112
• Main Authors: Arunachalam, A., Dhanapandian, S., Manoharan, C., Sivakumar, G.
• Format: Journal Article
• Language: English
• Published: England Elsevier B.V 05.03.2015
• Subjects: Anti-Bacterial Agents - chemistry; Anti-Bacterial Agents - pharmacology; Antibacterial activity; Bacillus subtilis - drug effects; Hot Temperature; Nanoparticles - chemistry; Nanoparticles - ultrastructure; Porous nature; Sprayed nanocrystalline Zn-doped TiO2 thin films; Titanium - chemistry; Titanium - pharmacology; X-Ray Diffraction; Zinc - chemistry; Zinc - pharmacology; Antibacterial activity; Porous nature; Sprayed nanocrystalline Zn-doped TiO2 thin films; Sprayed nanocrystalline Zn-doped TiO thin films
• ISSN: 1386-1425; 1873-3557
• DOI: 10.1016/j.saa.2014.11.016

[Display omitted] •Zn-doped TiO2 thin films were deposited on glass substrates by spray pyrolysis technique.•XRD study confirms the Zn-doped TiO2 films are polycrystalline nature with tetragonal structure.•From the optical study a slight shrinkage of band gap has been observed in the case of the film doped with Zn.•The high transmittance of about 85% in the visible and near infra red regions.•The doped TiO2 thin film yielded the high antibacterial activity against Bacillus subtilis. Zinc doped Titanium dioxide (TiO2: Zn) thin films were deposited onto glass substrates by the spray pyrolysis technique with the substrate temperature 450°C. The structural, optical, photoluminescence (PL) properties and morphological studies were investigated for the films deposited with various doping concentration (0, 2, 4, 6 and 8at.%) of zinc. The results of X-ray diffraction (XRD) had shown the presence of anatase peak with a strong orientation along (101) plane at 8at.% of Zn-doped TiO2 film. Scanning electron microscopy (SEM) study showed the uniform distribution of grains with porous nature. Atomic force microscopy (AFM) observations indicated the tetragonal shape at 8at.% of Zn-doped TiO2 with the particle size and decrease in surface roughness. The emission at 398nm was observed at the 8at.% of Zn-doped TiO2 thin film. The carrier concentration and Hall mobility was increased with doping. The antibacterial activity was highly yielded for the Zn-doped TiO2 thin films.