Synthesis and characterization of Sn-doped TiO2 film for antibacterial applications

Simple sol–gel method has been exploited to deposit Sn-doped TiO 2 thin films on glass substrates. The resultant coatings were characterized by X-ray diffraction (XRD), UV–visible techniques (UV–Vis), Fourier transform infrared spectroscopy (FTIR), and photoluminescence analysis (PL). The XRD patter...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2021-07, Vol.127 (7), Article 498
Main Authors: Rajeswari, R., Venugopal, D., George, Amal, Raj, A. Dhayal, Sundaram, S. John, Bashir, A. K. H., Maaza, M., Kaviyarasu, K.
Format: Article
Language:English
Subjects:
Antiinfectives and antibacterials
Applied physics
Characterization and Evaluation of Materials
Chemical bonds
Condensed Matter Physics
Crystallites
Doping
E coli
Emission analysis
Fourier transforms
Glass substrates
Infrared analysis
Infrared spectroscopy
Machines
Manufacturing
Materials science
Nanotechnology
Optical and Electronic Materials
Photoluminescence
Physics
Physics and Astronomy
Processes
Sol-gel processes
Spectrum analysis
Surfaces and Interfaces
Thin Films
Tin
Titanium dioxide
X-ray diffraction
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Summary:Simple sol–gel method has been exploited to deposit Sn-doped TiO 2 thin films on glass substrates. The resultant coatings were characterized by X-ray diffraction (XRD), UV–visible techniques (UV–Vis), Fourier transform infrared spectroscopy (FTIR), and photoluminescence analysis (PL). The XRD pattern reveals an increase in crystallite size of the prepared samples with the increasing doping concentration. A decrease in doping concentrating resulted in the decrease in bandgap values. The different chemical bonds on these films were identified from their FTIR spectra. The photoluminescence analysis shows an increase in the emission peak intensity with increasing dopant concentration, and this can be attributed to the effect created due to surface states. The prepared samples were tested as antibacterial agent toward both Gram-positive and Gram-negative bacteria like S. aureus (Staphylococcus aureus) and E. coli (Escherichia coli), respectively. The size of the inhibition zones indicates that the sample shows maximum inhibitory property toward E. coli when compared to S. aureus .
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-021-04656-w