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Surface-Selective Preferential Production of Reactive Oxygen Species on Piezoelectric Ceramics for Bacterial Killing

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journal contribution
posted on 07.09.2016, 00:00 by Guoxin Tan, Shuangying Wang, Ye Zhu, Lei Zhou, Peng Yu, Xiaolan Wang, Tianrui He, Junqi Chen, Chuanbin Mao, Chengyun Ning
Reactive oxygen species (ROS) can be used to kill bacterial cells, and thus the selective generation of ROS from material surfaces is an emerging direction in antibacterial material discovery. We found the polarization of piezoelectric ceramic causes the two sides of the disk to become positively and negatively charged, which translate into cathode and anode surfaces in an aqueous solution. Because of the microelectrolysis of water, ROS are preferentially formed on the cathode surface. Consequently, the bacteria are selectively killed on the cathode surface. However, the cell experiment suggested that the level of ROS is safe for normal mammalian cells.