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Title: An antibacterial platform based on capacitive carbon-doped TiO2 nanotubes after direct or alternating current charging
Authors: Wang, GM
Feng, HQ
Hu, LS 
Jin, WH
Hao, Q
Gao, A
Peng, X
Li, W
Wong, KY 
Wang, HY
Li, Z
Chu, PK
Issue Date: 2018
Publisher: Nature Publishing Group
Source: Nature communications, 24 May 2018, v. 9, 2055, p. 1-12 How to cite?
Journal: Nature communications 
Abstract: Electrical interactions between bacteria and the environment are delicate and essential. In this study, an external electrical current is applied to capacitive titania nanotubes doped with carbon (TNT-C) to evaluate the effects on bacteria killing and the underlying mechanism is investigated. When TNT-C is charged, post-charging antibacterial effects proportional to the capacitance are observed. This capacitance-based antibacterial system works well with both direct and alternating current (DC, AC) and the higher discharging capacity in the positive DC (DC+) group leads to better antibacterial performance. Extracellular electron transfer observed during early contact contributes to the surface-dependent post-charging antibacterial process. Physiologically, the electrical interaction deforms the bacteria morphology and elevates the intracellular reactive oxygen species level without impairing the growth of osteoblasts. Our finding spurs the design of light-independent antibacterial materials and provides insights into the use of electricity to modify biomaterials to complement other bacteria killing measures such as light irradiation.
EISSN: 2041-1723
DOI: 10.1038/s41467-018-04317-2
Rights: Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
© The Author(s) 2018
The following publication Wang, G., Feng, H., Hu, L., Jin, W., Hao, Q., Gao, A., ... & Chu, P. K. (2018). An antibacterial platform based on capacitive carbon-doped TiO 2 nanotubes after direct or alternating current charging. Nature communications, 9, 2055, 1-12 is available at
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