Carbon Quantum Dots Modified Polyurethane Nanocomposite as Effective Photocatalytic and Antibacterial Agents

0498931 - ÚFCH JH 2019 RIV US eng J - Journal Article
Kováčová, M. - Marković, Z. M. - Humpolíček, P. - Mičušík, M. - Švajdlenková, H. - Kleinová, A. - Danko, M. - Kubát, Pavel - Vajďák, J. - Capáková, Z. - Lehocký, M. - Münster, L. - Marković, B. M. T. - Špitálský, Z.
Carbon Quantum Dots Modified Polyurethane Nanocomposite as Effective Photocatalytic and Antibacterial Agents.
ACS BIOMATERIALS SCIENCE & ENGINEERING. Roč. 4, č. 12 (2018), s. 3983-3993. ISSN 2373-9878. E-ISSN 2373-9878
R&D Projects: GA ČR(CZ) GA17-05095S
Institutional support: RVO:61388955
Keywords : singlet oxygen * photodynamic therapy * methylene-blue * light * nanoparticles * surfaces * photoluminescence * behavior * violet * hydrophobic carbon quantum dots
OECD category: Physical chemistry
Impact factor: 4.511, year: 2018

Development of new types of antibacterial coatings or nanocomposites is of great importance due to widespread multidrug-resistant infections including bacterial infections. Herein, we investigated biocompatibility as well as structural, photocatalytic, and antibacterial properties of photoactive hydrophobic carbon quantum dots/polyurethane nanocomposite. The swell-encapsulation-shrink method was applied for production of these nanocomposites. Hydrophobic carbon quantum dots/polyurethane nanocomposites were found to be highly effective generator of singlet oxygen upon irradiation by low-power blue light. Analysis of conducted antibacterial tests on Staphyloccocus aureus and Escherichia coli showed 5-log bactericidal effect of these nanocomposites within 60 min of irradiation. Very powerful degradation of dye (rose bengal) was observed within 180 min of blue light irradiation of the nanocomposites. Biocompatibility studies revealed that nanocomposites were not cytotoxic against mouse embryonic fibroblast cell line, whereas they showed moderate cytotoxicity toward adenocarcinomic human epithelial cell line. Minor hemolytic effect of these nanocomposites toward red blood cells was revealed.
Permanent Link: http://hdl.handle.net/11104/0291222