An Antibacterial Platform Based on Capacitive Carbon-Doped TiO2 Nanotubes after Charging with Direct/Alternating Currents

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)peer-review

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Author(s)

  • Hongqing FENG
  • Liangsheng HU
  • Weihong Jin
  • Qi Hao
  • Kwok-Yin Wong
  • Huaiyu Wang
  • Zhou Li

Detail(s)

Original languageEnglish
Pages51
Publication statusPublished - Nov 2018

Conference

Title2nd International Conference on Advanced Functional Materials & Interfaces (AFMI 2018)
PlaceChina
CityWuhan
Period1 - 5 November 2018

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.

Citation Format(s)

An Antibacterial Platform Based on Capacitive Carbon-Doped TiO2 Nanotubes after Charging with Direct/Alternating Currents. / Wang, Guomin; FENG, Hongqing; HU, Liangsheng; Jin, Weihong; Hao, Qi; Gao, Ang; Peng, Xiang; Li, Wan; Wong, Kwok-Yin; Wang, Huaiyu; Li, Zhou; Chu, Paul K.

2018. 51 Paper presented at 2nd International Conference on Advanced Functional Materials & Interfaces (AFMI 2018), Wuhan, China.

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)peer-review