Two-functional direct current sputtered silver-containing titanium dioxide thin films

Abstract

The article reports on structure, mechanical, optical, photocatalytic and biocidal properties of Ti-Ag-O films. The Ti-Ag-O films were reactively sputter-deposited from a composed Ti/Ag target at different partial pressures of oxygen $$ pO ₂ on unheated glass substrate held on floating potential U _fl. It was found that addition of ∼2 at.% of Ag into TiO ₂ film has no negative influence on UV-induced hydrophilicity of TiO ₂ film. Thick (∼1,500 nm) TiO ₂/Ag films containing (200) anatase phase exhibit the best hydrophilicity with water droplet contact angle (WDCA) lower than 10° after UV irradiation for 20 min. Thick (∼1,500 nm) TiO ₂/Ag films exhibited a better UV-induced hydrophilicity compared to that of thinner (∼700 nm) TiO2/Ag films. Further it was found that hydrophilic TiO ₂/Ag films exhibit a strong biocidal effect under both the visible light and the UV irradiation with 100% killing efficiency of Escherichia coli ATCC 10536 after UV irradiation for 20 min. Reported results show that single layer of TiO ₂ with Ag distributed in its whole volume exhibits, after UV irradiation, simultaneously two functions: (1) excellent hydrophilicity with WDCA < 10° and (2) strong power to kill E. coli even under visible light due to direct toxicity of Ag.

Original language	English
Pages (from-to)	313-320
Number of pages	8
Journal	Nanoscale Research Letters
Volume	4
Issue number	4
DOIs	https://doi.org/10.1007/s11671-008-9244-z
Publication status	Published - 1 Apr 2009

Keywords

Ag addition
Biocidal activity
Hydrophilicity
Mechanical properties
Sputtering
TiO

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1007/s11671-008-9244-z

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title = "Two-functional direct current sputtered silver-containing titanium dioxide thin films",

abstract = "The article reports on structure, mechanical, optical, photocatalytic and biocidal properties of Ti-Ag-O films. The Ti-Ag-O films were reactively sputter-deposited from a composed Ti/Ag target at different partial pressures of oxygen $$ pO 2 on unheated glass substrate held on floating potential U fl. It was found that addition of ∼2 at.% of Ag into TiO 2 film has no negative influence on UV-induced hydrophilicity of TiO 2 film. Thick (∼1,500 nm) TiO 2/Ag films containing (200) anatase phase exhibit the best hydrophilicity with water droplet contact angle (WDCA) lower than 10° after UV irradiation for 20 min. Thick (∼1,500 nm) TiO 2/Ag films exhibited a better UV-induced hydrophilicity compared to that of thinner (∼700 nm) TiO2/Ag films. Further it was found that hydrophilic TiO 2/Ag films exhibit a strong biocidal effect under both the visible light and the UV irradiation with 100% killing efficiency of Escherichia coli ATCC 10536 after UV irradiation for 20 min. Reported results show that single layer of TiO 2 with Ag distributed in its whole volume exhibits, after UV irradiation, simultaneously two functions: (1) excellent hydrophilicity with WDCA < 10° and (2) strong power to kill E. coli even under visible light due to direct toxicity of Ag.",

keywords = "Ag addition, Biocidal activity, Hydrophilicity, Mechanical properties, Sputtering, TiO",

author = "J. Musil and M. Louda and R. Cerstvy and P. Baroch and Ditta, {I. B.} and A. Steele and Foster, {H. A.}",

year = "2009",

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T1 - Two-functional direct current sputtered silver-containing titanium dioxide thin films

AU - Musil, J.

AU - Louda, M.

AU - Cerstvy, R.

AU - Baroch, P.

AU - Ditta, I. B.

AU - Steele, A.

AU - Foster, H. A.

PY - 2009/4/1

Y1 - 2009/4/1

N2 - The article reports on structure, mechanical, optical, photocatalytic and biocidal properties of Ti-Ag-O films. The Ti-Ag-O films were reactively sputter-deposited from a composed Ti/Ag target at different partial pressures of oxygen $$ pO 2 on unheated glass substrate held on floating potential U fl. It was found that addition of ∼2 at.% of Ag into TiO 2 film has no negative influence on UV-induced hydrophilicity of TiO 2 film. Thick (∼1,500 nm) TiO 2/Ag films containing (200) anatase phase exhibit the best hydrophilicity with water droplet contact angle (WDCA) lower than 10° after UV irradiation for 20 min. Thick (∼1,500 nm) TiO 2/Ag films exhibited a better UV-induced hydrophilicity compared to that of thinner (∼700 nm) TiO2/Ag films. Further it was found that hydrophilic TiO 2/Ag films exhibit a strong biocidal effect under both the visible light and the UV irradiation with 100% killing efficiency of Escherichia coli ATCC 10536 after UV irradiation for 20 min. Reported results show that single layer of TiO 2 with Ag distributed in its whole volume exhibits, after UV irradiation, simultaneously two functions: (1) excellent hydrophilicity with WDCA < 10° and (2) strong power to kill E. coli even under visible light due to direct toxicity of Ag.

AB - The article reports on structure, mechanical, optical, photocatalytic and biocidal properties of Ti-Ag-O films. The Ti-Ag-O films were reactively sputter-deposited from a composed Ti/Ag target at different partial pressures of oxygen $$ pO 2 on unheated glass substrate held on floating potential U fl. It was found that addition of ∼2 at.% of Ag into TiO 2 film has no negative influence on UV-induced hydrophilicity of TiO 2 film. Thick (∼1,500 nm) TiO 2/Ag films containing (200) anatase phase exhibit the best hydrophilicity with water droplet contact angle (WDCA) lower than 10° after UV irradiation for 20 min. Thick (∼1,500 nm) TiO 2/Ag films exhibited a better UV-induced hydrophilicity compared to that of thinner (∼700 nm) TiO2/Ag films. Further it was found that hydrophilic TiO 2/Ag films exhibit a strong biocidal effect under both the visible light and the UV irradiation with 100% killing efficiency of Escherichia coli ATCC 10536 after UV irradiation for 20 min. Reported results show that single layer of TiO 2 with Ag distributed in its whole volume exhibits, after UV irradiation, simultaneously two functions: (1) excellent hydrophilicity with WDCA < 10° and (2) strong power to kill E. coli even under visible light due to direct toxicity of Ag.

KW - Ag addition

KW - Biocidal activity

KW - Hydrophilicity

KW - Mechanical properties

KW - Sputtering

KW - TiO

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