Electrochemical and fluorescence properties of SnO2 thin films and its antibacterial activity

• Synthesis of SnO2 thin films by spin coating method.
• The as-deposited films were annealed at 350 °C and 450 °C.
• The effect of annealing temperature on fluorescence and electrochemical properties of the films were analyzed.
• For the first time the fluorescence property of SnO2 thin films has been studied.
• All film shows antibacterial activity against E. coli and Bacillus.

Nanocrystalline SnO2 thin films were deposited by a simple and inexpensive sol–gel spin coating technique and the films were annealed at two different temperatures (350 °C and 450 °C). Structural, vibrational, optical and electrochemical properties of the films were analyzed using XRD, FTIR, UV–Visible, fluorescence and cyclic voltammetry techniques respectively and their results are discussed in detail. The antimicrobial properties of SnO2 thin films were investigated by agar agar method and the results confirm the antibacterial activity of SnO2 against Escherichiacoli and Bacillus.

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