Enhanced antibacterial properties of biocompatible titanium via electrochemically deposited Ag/TiO2 nanotubes and chitosan-gelatin-Ag-ZnO complex coating
A novel double-layered antibacterial coating was fabricated on pure titanium (Ti) via a simple three-step electrodeposition process. Scanning electronic microscopy (SEM) images show that the coating was constructed with the inner layer of TiO 2 nanotubes doped with silver nanoparticles (TNTs/Ag) and...
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Published in | RSC advances Vol. 9; no. 8; pp. 4521 - 4529 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Cambridge
Royal Society of Chemistry
05.02.2019
The Royal Society of Chemistry |
Subjects | |
Online Access | Get full text |
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Summary: | A novel double-layered antibacterial coating was fabricated on pure titanium (Ti)
via
a simple three-step electrodeposition process. Scanning electronic microscopy (SEM) images show that the coating was constructed with the inner layer of TiO
2
nanotubes doped with silver nanoparticles (TNTs/Ag) and the outer layer of chitosan-gelatin mixture with zinc oxide and silver nanoparticles (CS-Gel-Ag-ZnO). In comparison, we also investigated the composition, structure and antibacterial properties of pure Ti coated with TNTs, TNTs/Ag or TNTs/Ag + CS-Gel-Ag-ZnO, respectively. The TNTs was about 100 nm wide and 240 nm to 370 nm tall, and most Ag nanoparticles (Ag NPs) with diameter smaller than 20 nm were successfully deposited inside the tubes. The CS-Gel-Ag-ZnO layer was continuous and uniform. Antibacterial activity against planktonic and adherent bacteria were both investigated. Agar diffusion test against
Staphylococcus aureus
(
S. aureus
) shows improved antibacterial capacity of the TNTs/Ag + CS-Gel-Ag-ZnO coating, with a clear zone of inhibition (ZOI) up to 14.5 mm wide. Dead adherent bacteria were found on the surface by SEM. The antibacterial rate against planktonic
S. aureus
was as high as 99.2% over the 24 h incubation period.
A novel complex antibacterial coating fabricated
via
a simple three-step electrodeposition process shows high antibacterial rate of 99.2%. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 The authors contributed equally to this work. |
ISSN: | 2046-2069 |
DOI: | 10.1039/c8ra07682k |