title   
  

Diameter of titanium nanotubes influences anti-bacterial efficacy

Ercan, Batur and Taylor, Erik and Alpaslan, Ece and Webster, Thomas J. (2011) Diameter of titanium nanotubes influences anti-bacterial efficacy. Nanotechnology, 22 (29). ISSN 0957-4484

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Official URL: http://dx.doi.org/10.1088/0957-4484/22/29/295102

Abstract

Bacterial infection of in-dwelling medical devices is a growing problem that cannot be treated by traditional antibiotics due to the increasing prevalence of antimicrobial resistance and biofilm formation. Here, due to changes in surface parameters, it is proposed that bacterial adhesion can be prevented through nanosurface modifications of the medical device alone. Toward this goal, titanium was created to possess nanotubular surface topographies of highly controlled diameters of 20, 40, 60, or 80 nm, sometimes followed by heat treatment to control chemistry and crystallinity, through a novel anodization process. For the first time it was found that through the control of Ti surface parameters including chemistry, crystallinity, nanotube size, and hydrophilicity, significantly changed responses of both Staphylococcus epidermidis and Staphylococcus aureus (pathogens relevant for orthopaedic and other medical device related infections) were measured. Specifically, heat treatment of 80 nm diameter titanium tubes produced the most robust antimicrobial effect of all surface treatment parameters tested. This study provides the first step toward understanding the surface properties of nano-structured titanium that improve tissue growth (as has been previously observed with nanotubular titanium), while simultaneously reducing infection without the use of pharmaceutical drugs.

Item Type:Article
Additional Information:Article Number: 295102
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
T Technology > T Technology (General) > T174.7 Nanotechnology
Q Science > QC Physics
ID Code:16605
Deposited By:Ece Alpaslan
Deposited On:11 Jul 2011 15:57
Last Modified:11 Jul 2011 15:57

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