Photoelectrochemical sterilization of microbial cells by semiconductor powders

Tadashi Matsunaga; Ryozo Tomoda; Toshiaki Nakajima; Hitoshi Wake

Photoelectrochemical sterilization of microbial cells by semiconductor powders

Tadashi Matsunaga^*, Ryozo Tomoda, Toshiaki Nakajima, Hitoshi Wake

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1299 Citations (Scopus)

Abstract

We report the novel concept of photochemical sterilization. Microbial cells were killed photoelectrochemically with semiconductor powder (platinum-loaded titanium oxide, TiO₂/Pt). Coenzyme A, (CoA) in the whole cells was photo-electrochemically oxidized and, as a result, the respiration of cells was inhibited. Inhibition of respiratory activity caused death of the cells. Lactobacillus acidophilus, Saccharomyces cerevisiae and Escherichia coli (10³ cells/ml respectively) were completely sterilized when they were incubated with TiO₂/Pt particles under metal halide lamp irradiation for 60-120 min.

Original language	English
Pages (from-to)	211-214
Number of pages	4
Journal	FEMS Microbiology Letters
Volume	29
Issue number	1-2
Publication status	Published - 1985
Externally published	Yes

Keywords

coenzyme A
Saccharomyces cerevisiae
semiconductor
Sterilization

ASJC Scopus subject areas

Microbiology
Medicine(all)
Molecular Biology
Genetics

Cite this

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title = "Photoelectrochemical sterilization of microbial cells by semiconductor powders",

abstract = "We report the novel concept of photochemical sterilization. Microbial cells were killed photoelectrochemically with semiconductor powder (platinum-loaded titanium oxide, TiO2/Pt). Coenzyme A, (CoA) in the whole cells was photo-electrochemically oxidized and, as a result, the respiration of cells was inhibited. Inhibition of respiratory activity caused death of the cells. Lactobacillus acidophilus, Saccharomyces cerevisiae and Escherichia coli (103 cells/ml respectively) were completely sterilized when they were incubated with TiO2/Pt particles under metal halide lamp irradiation for 60-120 min.",

keywords = "coenzyme A, Saccharomyces cerevisiae, semiconductor, Sterilization",

author = "Tadashi Matsunaga and Ryozo Tomoda and Toshiaki Nakajima and Hitoshi Wake",

year = "1985",

language = "English",

volume = "29",

pages = "211--214",

journal = "FEMS Microbiology Letters",

issn = "0378-1097",

publisher = "Wiley-Blackwell",

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TY - JOUR

T1 - Photoelectrochemical sterilization of microbial cells by semiconductor powders

AU - Matsunaga, Tadashi

AU - Tomoda, Ryozo

AU - Nakajima, Toshiaki

AU - Wake, Hitoshi

PY - 1985

Y1 - 1985

N2 - We report the novel concept of photochemical sterilization. Microbial cells were killed photoelectrochemically with semiconductor powder (platinum-loaded titanium oxide, TiO2/Pt). Coenzyme A, (CoA) in the whole cells was photo-electrochemically oxidized and, as a result, the respiration of cells was inhibited. Inhibition of respiratory activity caused death of the cells. Lactobacillus acidophilus, Saccharomyces cerevisiae and Escherichia coli (103 cells/ml respectively) were completely sterilized when they were incubated with TiO2/Pt particles under metal halide lamp irradiation for 60-120 min.

AB - We report the novel concept of photochemical sterilization. Microbial cells were killed photoelectrochemically with semiconductor powder (platinum-loaded titanium oxide, TiO2/Pt). Coenzyme A, (CoA) in the whole cells was photo-electrochemically oxidized and, as a result, the respiration of cells was inhibited. Inhibition of respiratory activity caused death of the cells. Lactobacillus acidophilus, Saccharomyces cerevisiae and Escherichia coli (103 cells/ml respectively) were completely sterilized when they were incubated with TiO2/Pt particles under metal halide lamp irradiation for 60-120 min.

KW - coenzyme A

KW - Saccharomyces cerevisiae

KW - semiconductor

KW - Sterilization

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M3 - Article

AN - SCOPUS:0022380522

SN - 0378-1097

VL - 29

SP - 211

EP - 214

JO - FEMS Microbiology Letters

JF - FEMS Microbiology Letters

IS - 1-2

ER -

Photoelectrochemical sterilization of microbial cells by semiconductor powders

Abstract

Keywords

ASJC Scopus subject areas

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