Preparation of a colored conductive paint electrode for electrochemical inactivation of bacteria.
In this study we describe the preparation of a colored conductive paint electrode containing In(2)O(3), SnO(2), or TiO(2) for the electrochemical inactivation of marine bacteria. When each colored conductive paint electrode was immersed in seawater containing 10(6) cells/mL for 90 min, marine microbe attachment to the TiO(2)/SnO(2)/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% TiO(2)/SnO(2)/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.
Lim
Tae-Kyu
TK
Department of Biotechnology, Tokyo University of Agriculture & Technology, Koganei, Tokyo 184-8588, Japan.
Murakami
Tadataka
T
Tsuboi
Makoto
M
Yamashita
Kazuharu
K
Matsunaga
Tadashi
T
D001422:Bacterial Adhesion / Q000187:drug effects / Q000528:radiation effects; D018441:Biofilms / Q000187:drug effects* / Q000254:growth & development / Q000528:radiation effects*; D002470:Cell Survival / Q000187:drug effects / Q000528:radiation effects; D020099:Coated Materials, Biocompatible; D004553:Electric Conductivity; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods; D004566:Electrodes; D004574:Electromagnetic Fields; D004867:Equipment Design; D010150:Paint / Q000382:microbiology*; D012623:Seawater / Q000382:microbiology; D013242:Sterilization / Q000379:methods*; D014733:Vibrio / Q000187:drug effects / Q000502:physiology; D014871:Water Microbiology
D020099:Coated Materials, Biocompatible