Magnetron-Sputtered Ag Surfaces. New Evidence for the Nature of the Ag Ions Intervening in Bacterial Inactivation

DC-magnetron sputtering with an Ag target on textile surfaces produced Ag particles with sizes ∼4.7 nm (±15%). Sputtering for 15 s led to Ag layers of 15−20 nm. The threshold sputtering time precluding airborne bacterial growth was about 60 s. In this case, the coating was ∼40−50 nm thick and the co...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2010-01, Vol.2 (1), p.230-235
Main Authors: Mejía, M. I, Restrepo, G, Marín, J. M, Sanjines, R, Pulgarín, C, Mielczarski, E, Mielczarski, J, Kiwi, J
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - chemistry
Bacteria - growth & development
Bacteria - ultrastructure
Cotton Fiber
Microbial Viability
Silver - chemistry
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Summary:DC-magnetron sputtering with an Ag target on textile surfaces produced Ag particles with sizes ∼4.7 nm (±15%). Sputtering for 15 s led to Ag layers of 15−20 nm. The threshold sputtering time precluding airborne bacterial growth was about 60 s. In this case, the coating was ∼40−50 nm thick and the cotton Ag loading was 0.0026 wt %. The Ag particle size did not vary significantly with sputtering time between 15 and 600 s. Only coatings above this thickness lead to bacterial inactivation. Ag/Pt targets with sputtering times
ISSN:1944-8244
1944-8252
DOI:10.1021/am900662q