24November2017

Materials and Electronics Engineering

ZnO nanowires synthesized massively with actively antibacterial properties

Yaozhong Zhang1,*, Chao Zhang1, Hao Tian2, Xiaojun Zhang2, Xiaolin Li1, Lei Yin3, Eric Siu-Wai Kong1

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1Laboratory for Thin Film and Microfabrication Technology, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai, China
2Laboratory of Molecular Microbial Ecology and Ecogenomics, College of Life Science and Biotechnology, Shanghai Jiaotong University, Shanghai, China
3Shanghai Chang Zheng Hospital, Feng Yang Road No.415, Shanghai 200003,China

Materials and Electronics Engineering 2014,1:6

Publication Date (Web): December 17, 2014 (Article)

DOI:10.11605/mee-1-6

*Corresponding author. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Abstract

 


Figure 1 The procedure schematic of antibacterial activity testing
      ZnO Nanowires (NWs) have been synthesized massively by a modified carbon thermal reduction method. The ZnO nanowires, which looks like cotton, are observed as entangled and curved wire-like single crystalline structures. The edges of the ZnO NWs are smooth and  straight without secondary growth or extra structural features. Antibacterial properties of ZnO NWs against gram-negative bacterium Escherichia coli (E. Coli) have been evaluated by estimating the growth ratio of bacterial colonies in the presence and absence of ZnO NWs in liquid nutrient broth using colony-counting method. The results show that this material performs good antibacterial effect against E. Coli due to extremely large surface areas, high surface state and low crystal defect. Finally, the mechanism of pure ZnO NWs is discussed and it is mainly attributed to the ionic bond properties of ZnO based on noncentral symmetry and polar surfaces, and reactive oxygen species generated by ZnO NWs, which could damage and draw up bacteria. [1]

 

Keywords

ZnO nanowires, antibacterial properties, colony counting, ionic bond properties