Bactericidal properties of nanoscale zinc(II) and titanium (IV) oxides of different nature and their nanocomposites with polystyrene


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The samples with nano-titanium dioxide (X-ray amorphous, η-modification, Degussa P25 mixture of rutile and anatase, Hombifine N, and Hombikat UV100 with anatase) and hexagonal nano-ZnO both in pure form and as a part of polystyrene (PS) nanocomposites were studied for antibacterial activity in the dark against Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Bacillus antracoides, and Candida albicans microorganisms by the Kirby-Bauer disk diffusion method. Among the starting samples, ZnO exhibits ABA against all bacterial cultures in use; the sample with the η-phase exhibits ABA against Staphylococcus aureus, Staphylococcus epidermidis, and Bacillus antracoides; the X-ray amorphous TiO2 exhibits ABA against Staphylococcus aureus and Candida albicans; and the remaining samples have no ABA. The diameters of the microbial growth retardation zone for the η-phase/PS, X-ray amorphous TiO2/PS, and ZnO/PS nanocomposites were found to be less than those for the starting oxides; the range of microbes inhibited by ZnO/PS was smaller since it exhibited no ABA against Candida albicans, while such activity remained in the X-ray amorphous TiO2/PS nanocomposite.

Sobre autores

N. Serkhacheva

Moscow Technological University

Email: galina_kuzmicheva@list.ru
Rússia, pr. Vernadskogo 86, Moscow, 119571

N. Yashina

Peoples’ Friendship University of Russia

Email: galina_kuzmicheva@list.ru
Rússia, ul. Miklukho-Maklaya 6, Moscow, 117198

N. Prokopov

Moscow Technological University

Email: galina_kuzmicheva@list.ru
Rússia, pr. Vernadskogo 86, Moscow, 119571

A. Gaynanova

Moscow Technological University

Autor responsável pela correspondência
Email: galina_kuzmicheva@list.ru
Rússia, pr. Vernadskogo 86, Moscow, 119571

G. Kuz’micheva

Moscow Technological University

Email: galina_kuzmicheva@list.ru
Rússia, pr. Vernadskogo 86, Moscow, 119571

E. Domoroshchina

Moscow Technological University

Email: galina_kuzmicheva@list.ru
Rússia, pr. Vernadskogo 86, Moscow, 119571

N. Sadovskaya

Karpov Institute of Physical Chemistry

Email: galina_kuzmicheva@list.ru
Rússia, per. Obukha 3-1/12, build. 6, Moscow, 105064

N. Prokudina

Scientific Production Center ASPECT

Email: galina_kuzmicheva@list.ru
Rússia, ul. Sakharova 6, Dubna, Moscow region, 141980

A. Gervald

Moscow Technological University

Email: galina_kuzmicheva@list.ru
Rússia, pr. Vernadskogo 86, Moscow, 119571

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