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Differences in antibacterial activity of PMMA/TiO2/Ag nanocomposite on individual dominant bacterial isolates from packaged drinking water, and their consortium under UVC and dark conditions
Kumari J, Lakshmi D.S, Mathur A, Bhuvaneshwari M, Parashar A, , ,
Published in Elsevier BV
Volume: 362
Pages: 93 - 101

Nanocomposites of polymethyl-methacrylate (PMMA) have gained high attention owing to their extensive applications as antibacterial agents. The antibacterial activities of Ag and TiO 2 nanoparticles are well established. This study intended to differentiate the antibacterial activities exhibited by PMMA/TiO 2 /Ag nanocomposite, towards bacterial consortium and single dominant bacterial isolates from packaged drinking water. A silver nanoparticle dose-dependent decline in cell viability of consortium and individual isolates was compared under UVC and dark conditions to evaluate the antibacterial activity of the nanocomposite. To corroborate with the viability results, oxidative stress & cell permeability was also assessed under similar conditions. Surface characterization of PMMA/TiO 2 /Ag nanocomposite was performed by FTIR, AFM, and SEM analyses after interaction with the bacteria. The PMMA/TiO 2 /Ag nanocomposite showed enhanced antibacterial activity against single bacterial isolate compared to the consortium. The outcomes from the study with PMMA/TiO 2 /Ag nanocomposite necessitate relooking at the test design for assessment of antibacterial effects in real conditions incorporating the impact on the consortium of microorganisms instead of individual strains.

About the journal
JournalData powered by TypesetApplied Surface Science
PublisherData powered by TypesetElsevier BV
Open Access0
Authors (3)