Zn or O? An Atomic Level Comparison on Antibacterial Activities of Zinc Oxides.
Chemistry
; 22(24): 8053-8, 2016 06 06.
Article
en En
| MEDLINE
| ID: mdl-27124263
ABSTRACT
For the first time, the influence of different types of atoms (Zn and O) on the antibacterial activities of nanosized ZnO was quantitatively evaluated with the aid of a 3D-printing-manufactured evaluation system. Two different outermost atomic layers were manufactured separately by using an ALD (atomic layer deposition) method. Interestingly, we found that each outermost atomic layer exhibited certain differences against gram-positive or gram-negative bacterial species. Zinc atoms as outermost layer (ZnO-Zn) showed a more pronounced antibacterial effect towards gram-negative E. coli (Escherichia coli), whereas oxygen atoms (ZnO-O) showed a stronger antibacterial activity against gram-positive S. aureus (Staphylococcus aureus). A possible antibacterial mechanism has been comprehensively discussed from different perspectives, including Zn(2+) concentrations, oxygen vacancies, photocatalytic activities and the DNA structural characteristics of different bacterial species.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Oxígeno
/
Zinc
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Óxido de Zinc
/
Antibacterianos
Idioma:
En
Año:
2016
Tipo del documento:
Article