The effect of nanodiamond surface modification on interaction with Pseudomonas putida K12

• Published in: Protection of metals and physical chemistry of surfaces Vol. 53; no. 2; pp. 220 - 223
• Main Authors: Isakova, A. A., Safonov, A. V., Alexandrovskaya, A. Yu, Galushko, T. B., Indenbom, A. V., Spitsyn, B. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.03.2017; Springer Nature B.V
• Subjects: Bacteria; Biocides; Characterization and Evaluation of Materials; Chemistry and Materials Science; Chlorination; Corrosion and Coatings; Electrostatics; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Materials Science; Metallic Materials; Nanoparticles; Nanostructure; Physical chemistry; Physicochemical Processes at the Interfaces; Pseudomonas putida; Tribology
• ISSN: 2070-2051; 2070-206X
• DOI: 10.1134/S2070205117020137

Interactions between nanodiamonds with an unmodified surface and nanodiamonds with chlorinated, as well as aminated, surfaces and the bacterium surfaces and Pseudomonas putida K12 were studied. It was revealed that only nanodiamonds with a modified surface possessed a considerable biocidal effect. Aminated nanodiamonds were twice as efficient as chlorinated ones. Electron microscopy showed that nanodiamonds were adsorbed onto the cell surface and damaged it. It is proposed that the higher biocidity of the aminated nanoparticles was caused by a positive charge inducing electrostatic interaction with the negatively charged surface of the bacterial cytoplasmic membrane.