Topical issue: 23rd Symposium on Plasma Physics and Technology

The European Physical Journal D

, Volume 54, Issue 2, pp 189-193

First online:

Antibacterial effect of silver modified TiO2/PECVD films

  • P. HájkováAffiliated withDepartment of material science, Technical University of Liberec Email author 
  • , P. ŠpatenkaAffiliated withDepartment of material science, Technical University of LiberecDepartment of Physics, University of South Bohemia
  • , J. KrumeichAffiliated withFachhochschule Hof, University of Applied Sciences Hof
  • , P. ExnarAffiliated withDepartment of Chemistry, Technical University of Liberec
  • , A. KolouchAffiliated withDepartment of material science, Technical University of Liberec
  • , J. MatoušekAffiliated withDepartment of Macromolecular Physics, Charles University in Prague
  • , P. KočíAffiliated withRegional Hospital Liberec, Husova

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Abstract

This paper deals with photocatalytic activity of silver treated TiO2 films. The TiO2 films were deposited on glass substrates by plasma enhanced chemical vapor deposition (PECVD) in a vacuum reactor with radio frequency (RF) low temperature plasma discharge in the mixture of oxygen and titanium isopropoxide vapors (TTIP). The depositions were performed under different deposition conditions. Subsequently, the surface of TiO2 films was modified by deposition of silver nanoparticles. Photocatalytic activity of both silver modified and unmodified TiO2 films was determined by decomposition of the model organic matter (acid orange 7). Selected TiO2 samples were used for tests of antibacterial activity. These tests were performed on Gram-negative bacteria Escherichia coli. The results clearly proved that presence of silver clusters resulted in enhancement of the photocatalytic activity, which was up to four times higher than that for pure TiO2 films.

PACS

52.77.-j Plasma applications 68.43.-h Chemisorption/physisorption: adsorbates on surfaces 73.30.+y Surface double layers, Schottky barriers, and work functions