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Effect of ultrafine-grained titanium surfaces on adhesion of bacteria

Truong, Vi Kkanh, Rundell, Stuart, Lapovok, Rimma, Estrin, Yuri, Wang, James Y., Berndt, Christopher C., Barnes, David G., Fluke, Christopher J., Crawford, Russell J. and Ivanova, Elena P. 2009, Effect of ultrafine-grained titanium surfaces on adhesion of bacteria, Applied microbiology and biotechnology, vol. 83, no. 5, pp. 925-937, doi: 10.1007/s00253-009-1944-5.

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Title Effect of ultrafine-grained titanium surfaces on adhesion of bacteria
Author(s) Truong, Vi Kkanh
Rundell, Stuart
Lapovok, Rimma
Estrin, Yuri
Wang, James Y.
Berndt, Christopher C.
Barnes, David G.
Fluke, Christopher J.
Crawford, Russell J.
Ivanova, Elena P.
Journal name Applied microbiology and biotechnology
Volume number 83
Issue number 5
Start page 925
End page 937
Total pages 13
Publisher Springer
Place of publication Berlin, Germany
Publication date 2009-07
ISSN 1432-0614
Keyword(s) titanium surfaces
equal channel angular pressing (ECAP)
bacterial adhesion
staphylococcus aureus
pseudomonas aeruginosa
escherichia coli
Summary The influence of the ultrafine crystallinity of commercial purity grade 2 (as-received) titanium and titanium modified by equal channel angular pressing (modified titanium) on bacterial attachment was studied. A topographic profile analysis of the surface of the modified titanium revealed a complex morphology of the surface. Its prominent micro- and nano-scale features were 100-200-nm-scale undulations with 10-15 microm spacing. The undulating surfaces were nano-smooth, with height variations not exceeding 5-10 nm. These surface topography characteristics were distinctly different from those of the as-received samples, where broad valleys (up to 40-60 microm) were detected, whose inner surfaces exhibited asperities approximately 100 nm in height spaced at 1-2 microm. It was found that each of the three bacteria strains used in this study as adsorbates, viz. Staphylococcus aureus CIP 68.5, Pseudomonas aeruginosa ATCC 9025 and Escherichia coli K12, responded differently to the two types of titanium surfaces. Extreme grain refinement by ECAP resulted in substantially increased numbers of cells attached to the surface compared to as-received titanium. This enhanced degree of attachment was accompanied with an increased level of extracellular polymeric substances (EPS) production by the bacteria.
Language eng
DOI 10.1007/s00253-009-1944-5
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2009, Springer-Verlag
Persistent URL http://hdl.handle.net/10536/DRO/DU:30075973

Document type: Journal Article
Collection: Institute for Frontier Materials
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