Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 149-161 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 453 |
| DOIs | |
| Publication status | Published - 2014 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Antibacterial
- Electrochemical impedance spectroscopy
- Open circuit potential monitoring
- Silver dissolution
- Superhydrophobic
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Antibacterial properties and chemical stability of superhydrophobic silver-containing surface produced by sol-gel route. / Heinonen, S; Huttunen-Saarivirta, E; Nikkanen, J-P; Raulio, Mari; Priha, Outi; Laakso, J; Storgårds, Erna; Levänen, E.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 453, 2014, p. 149-161.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Antibacterial properties and chemical stability of superhydrophobic silver-containing surface produced by sol-gel route
AU - Heinonen, S
AU - Huttunen-Saarivirta, E
AU - Nikkanen, J-P
AU - Raulio, Mari
AU - Priha, Outi
AU - Laakso, J
AU - Storgårds, Erna
AU - Levänen, E
PY - 2014
Y1 - 2014
N2 - Superhydrophobic surface with and without nano-sized silver particles (AgNPs) using a sol-gel technique were prepared for antibacterial and chemical stability tests and electrochemical characterization. Antibacterial tests showed that the surface with AgNPs reduced the number of the bacteria. However, to be used in long-term industrial applications, the surfaces are required to have sufficient chemical stability in the operation environment. This is why the stability of the produced surfaces was studied as a function of pH value of the solution. According the results, the produced surfaces are stable in neutral environments but release silver ions at high rates and dissolve or undergo other structural changes in strongly acidic and alkaline environments during a timeframe of few weeks. Chemical stability of the produced surfaces may be monitored by electrochemical measurements in addition to straight-forward contact angle measurements. Open circuit potential monitoring effectively revealed the presence of silver on both unexposed and exposed coatings, due to the noble character of the element. Electrochemical impedance spectroscopy yielded information on the overall degradation mechanism of the superhydrophobic silver-containing coating, although its use requires calibration by the use of model systems involving different combinations of all included surface layers and relatively complex data modelling
AB - Superhydrophobic surface with and without nano-sized silver particles (AgNPs) using a sol-gel technique were prepared for antibacterial and chemical stability tests and electrochemical characterization. Antibacterial tests showed that the surface with AgNPs reduced the number of the bacteria. However, to be used in long-term industrial applications, the surfaces are required to have sufficient chemical stability in the operation environment. This is why the stability of the produced surfaces was studied as a function of pH value of the solution. According the results, the produced surfaces are stable in neutral environments but release silver ions at high rates and dissolve or undergo other structural changes in strongly acidic and alkaline environments during a timeframe of few weeks. Chemical stability of the produced surfaces may be monitored by electrochemical measurements in addition to straight-forward contact angle measurements. Open circuit potential monitoring effectively revealed the presence of silver on both unexposed and exposed coatings, due to the noble character of the element. Electrochemical impedance spectroscopy yielded information on the overall degradation mechanism of the superhydrophobic silver-containing coating, although its use requires calibration by the use of model systems involving different combinations of all included surface layers and relatively complex data modelling
KW - Antibacterial
KW - Electrochemical impedance spectroscopy
KW - Open circuit potential monitoring
KW - Silver dissolution
KW - Superhydrophobic
U2 - 10.1016/j.colsurfa.2014.04.037
DO - 10.1016/j.colsurfa.2014.04.037
M3 - Article
VL - 453
SP - 149
EP - 161
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
ER -