Chapter

Trends in Colloid and Interface Science XXIII

Volume 137 of the series Progress in Colloid and Polymer Science pp 41-45

Date:

Bacterial Attachment Response on Titanium Surfaces with Nanometric Topographic Features

  • Vi Khanh TruongAffiliated withFaculty of Life and Social Sciences, Swinburne University of Technology
  • , James WangAffiliated withIRIS, Swinburne University of Technology
  • , Rimma LapovokAffiliated withARC Centre of Excellence for Design in Light Metals, Department of Materials Engineering, Monash University
  • , Yuri EstrinAffiliated withARC Centre of Excellence for Design in Light Metals, Department of Materials Engineering, Monash UniversityCSIRO Division of Process Science and Engineering
  • , Francois MalherbeAffiliated withFaculty of Life and Social Sciences, Swinburne University of Technology
  • , Christopher BerndtAffiliated withIRIS, Swinburne University of Technology
  • , Russell CrawfordAffiliated withFaculty of Life and Social Sciences, Swinburne University of Technology
  • , Elena IvanovaAffiliated withFaculty of Life and Social Sciences, Swinburne University of Technology Email author 

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Abstract

The bacterial attachment response on titanium surfaces with various degrees of nano-roughness in the range of 14 nm to 0.6 nm has been investigated. Titanium surfaces were fabricated from commercial purity grade 2 (as-received) titanium, titanium modified by equal channel angular pressing (modified titanium) and titanium thin film of 12 nm and 150 nm obtained using a magnetron sputtering system. The chemical composition, wettability and surface architecture of Ti surfaces were characterised using X-ray photoelectron spectroscopy, contact angle measurements and atomic force microscopy. Two human pathogenic bacteria, Staphylococcus aureus CIP 68.5 and Pseudomonas aeruginosa ATCC 9025 were found to respond differently to each of the tested surfaces. The results indicate that bacteria can differentiate between surfaces with the fine (less than 1 nm) change of topographic characteristics, the number of retained cells differing by a factor of up to 2.

Keywords

Titanium surfaces Equal channel angular pressing (ECAP) Titanium thin films Bacterial adhesion Staphylococcus aureus Pseudomonas aeruginosa Nanotopography