Antibacterial properties of laser-encapsulated titanium oxide nanotubes decorated with nanosilver and covered with chitosan/Eudragit polymers

• DOI: 10.1016/j.bioadv.2022.212950
• Publication Date: 2022-05-26T17:20:13Z
• Authors: Łukasz Pawłowski; Jakub Wawrzyniak; Adrianna Banach-K...; Bartłomiej Michał...; Kacper Jurak; Jakub Karczewski; Robert Tylingo; Katarzyna Siuzdak; Andrzej Zieliński
• Keywords: Superhydrophilicity; Simulated body fluid; Surface Modification; Titanium oxide; Biopolymer; Silver nanoparticle

To provide antibacterial properties, the titanium samples were subjected to electrochemical oxidation in fluoride-containing diethylene glycol-based electrolyte create a oxide nanotubular surface. Afterward, surface was covered by sputtering with silver 5 nm film, and tops of nanotubes capped using laser treatment, resulting an appearance nanoparticles (AgNPs) around 30 diameter on such modified ensure controlled release bactericidal substance, additionally coated pH-sensitive chitosan/Eudragit 100 coating, also exhibiting properties. The characterized SEM, EDS, AFM, Raman, XPS techniques. wettability, corrosion adhesion coating substrate, AgNPs into solutions simulating body fluids at different pH, properties further investigated. obtained composite coatings hydrophilic, adjacent surface, corrosion-resistant. An increase amount released as ions or metallic particles simulated fluid solution acidic pH observed for biopolymer after three days exposure avoiding burst effect. proposed modification effective against both Gram-positive Gram-negative bacteria.