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Journal of Nanomaterials
Volume 2017 (2017), Article ID 1287698, 12 pages
https://doi.org/10.1155/2017/1287698
Research Article

New Class of Antimicrobial Agents: SBA-15 Silica Containing Anchored Copper Ions

1Department of Microelectronics and Nanotechnology, Czestochowa University of Technology, Al. Armii Krajowej 36, 42-201 Czestochowa, Poland
2H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Krakow, Poland
3Institute of Environmental Engineering, Czestochowa University of Technology, ul. Brzeznicka 60a, 42-200 Czestochowa, Poland
4Institute of Computer Science, Czestochowa University of Technology, ul. Dabrowskiego 69, 42-201 Czestochowa, Poland
5Institute of Mechanical Technologies, Czestochowa University of Technology, Al. Armii Krajowej 21, 42-201 Czestochowa, Poland
6Faculty of Computer Science and Materials Science, University of Silesia, Institute of Materials Science, Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

Correspondence should be addressed to Lukasz Laskowski; lp.zcp.kik@ikswoksal.zsakul

Received 9 September 2016; Revised 18 November 2016; Accepted 7 December 2016; Published 22 February 2017

Academic Editor: Mauro Pollini

Copyright © 2017 Lukasz Laskowski et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The paper is about a new class of antimicrobial functional nanomaterials. Proposed compounds are based on SBA-15 porous silica matrices and contain anchored copper ions. Thanks to the immobilization of functional groups the compounds are safer for environment than commonly used disinfectant agents. We prepared and examined silica based materials containing two concentrations of copper-containing groups: 10 and 5%. For the reference we prepared samples containing free-standing CuO molecules in the structure and checked their antimicrobial properties. Antibacterial effect of considered SBA-15-Cu material was tested on Escherichia coli bacteria. Antimicrobial tests were applied for the pure form of the material and as modifying agents for plastics. The obtained results showed that the sample with lower concentration of active copper-containing groups has stronger antimicrobial properties than the one with higher concentration of copper. Interestingly, silica containing free-standing CuO molecules has no antimicrobial properties. Considering the obtained results, we can conclude that the most probable antimicrobial mechanism in this case is an oxidation stress. When a plastic modifier is applied the material is enriched with bacterial inhibitory properties. It seems that SBA-15 silica containing low concentration of anchored copper ions is promising in terms of its antibacterial property and biomaterial potential for commercial use.