Antibacterial properties and chemical stability of superhydrophobic silver-containing surface produced by sol-gel route

S Heinonen, E Huttunen-Saarivirta, J-P Nikkanen, Mari Raulio, Outi Priha, J Laakso, Erna Storgårds, E Levänen

Research output: Contribution to journalArticleScientificpeer-review

34 Citations (Scopus)

Abstract

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
Original languageEnglish
Pages (from-to)149-161
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume453
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

Chemical stability
Silver
Sol-gels
silver
routes
gels
coatings
stability tests
Coatings
bacteria
Angle measurement
Electrochemical impedance spectroscopy
surface layers
Particles (particulate matter)
Industrial applications
Contact angle
Data structures
impedance
Bacteria
degradation

Keywords

  • Antibacterial
  • Electrochemical impedance spectroscopy
  • Open circuit potential monitoring
  • Silver dissolution
  • Superhydrophobic

Cite this

Heinonen, S ; Huttunen-Saarivirta, E ; Nikkanen, J-P ; Raulio, Mari ; Priha, Outi ; Laakso, J ; Storgårds, Erna ; Levänen, E. / Antibacterial properties and chemical stability of superhydrophobic silver-containing surface produced by sol-gel route. In: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2014 ; Vol. 453. pp. 149-161.
@article{3e4fc858095c42fabb2fc72106ec2dad,
title = "Antibacterial properties and chemical stability of superhydrophobic silver-containing surface produced by sol-gel route",
abstract = "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",
keywords = "Antibacterial, Electrochemical impedance spectroscopy, Open circuit potential monitoring, Silver dissolution, Superhydrophobic",
author = "S Heinonen and E Huttunen-Saarivirta and J-P Nikkanen and Mari Raulio and Outi Priha and J Laakso and Erna Storg{\aa}rds and E Lev{\"a}nen",
year = "2014",
doi = "10.1016/j.colsurfa.2014.04.037",
language = "English",
volume = "453",
pages = "149--161",
journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
issn = "0927-7757",
publisher = "Elsevier",

}

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 journalArticleScientificpeer-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 -