Superoxide anion: Critical source of high performance antibacterial activity in Co-Doped ZnO QDs
Superoxide anion: Critical source of high performance antibacterial activity in Co-Doped ZnO QDs
复制标题
超氧阴离子：共掺杂 ZnO 量子点高性能抗菌活性的关键来源
DOI：
10.1016/j.ceramint.2020.03.129
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发表时间：
2020-07-01
影响因子：
5.2
通讯作者：
Munir, Hafiz Akif
中科院分区：
文献类型：
--
作者：
Liu, Junli;Wang, Yuhan;Munir, Hafiz Akif
In this paper, Co-doped ZnO quantum dots (QDs) with smaller lateral size and high stability were prepared via a simple and one-step sol-gel method. We found that Co-doped ZnO QDs could more effectively absorb visible light and motivate the separation efficiency of photogenerated electrons and holes, resulting in the over yield production of superoxide anion (O-center dot(2)-) and hydroxyl radical ((OH)-O-center dot) under environmental condition. As a result, the antibacterial activity of Co-doped ZnO QDs was drastically improved than that of bare ZnO QDs, and the superoxide radicals mediated oxidative stress plays a dominant role in the antibacterial mechanism. Besides, controllable construction of smaller size Co-doped ZnO QDs was favoured for the contact between the nanoparticles and bacteria, thus significantly decreased the transmission path of ROS and Zn2+, causing the markedly enhanced antibacterial activities.
