Preparation of a colored conductive paint electrode for electrochemical inactivation of bacteria

Tae Kyu Lim, Tadataka Murakami, Makoto Tsuboi, Kazuharu Yamashita, Tadashi Matsunaga*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


In this study we describe the preparation of a colored conductive paint electrode containing In2O3, SnO2, or TiO2 for the electrochemical inactivation of marine bacteria. When each colored conductive paint electrode was immersed in seawater containing 106 cells/mL for 90 min, marine microbe attachment to the TiO2/SnO2/Sb electrode surface was minimal. Preparation of electrodes coated with 40% particles is shown to be more cost-effective, and because of their more translucent coatings they can be painted over with bright colors. When a potential of 1.0 V was applied for 30 min to the colored conductive paint electrode (40 wt% TiO2/SnO2/Sb) in sterile seawater, the survival ratio decreased to 55%. When 1.5 V vs. saturated calomel electrode (SCE) was applied, all attached cells were inactivated. Chlorine was not detected below an applied potential of 1.5 V. A change in pH was not observed in the range of 0 to 1.5 V. This method might be effective for preventing bacterial cell accumulation and the formation of biofilms.

Original languageEnglish
Pages (from-to)299-304
Number of pages6
JournalBiotechnology and Bioengineering
Issue number3
Publication statusPublished - 2003 Feb 5
Externally publishedYes


  • Bacteria
  • Colored conductive paint electrode
  • Electrochemical inactivation
  • Metal particles

ASJC Scopus subject areas

  • Biotechnology
  • Microbiology


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