Synthesis of ZnO Nanorods and AFM Study on Their Photocatalytic Antimicrobial ActivityReport as inadecuate




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ZnO nanorods were synthesized by solution method and the photocatalytic antimicrobial activities were characterized by AFM. The samples irradiated by ultraviolet for 30 minutes were used to research the photocatalytic antimicrobial activities against Escherichia coil E.coli HB101. The topography image and phase image of E. coli treated by ZnO were observed by AFM tapping mode, and force curve were obtained by AFM contact mode. The results show that the surface of the bacteria becomes inhomogeneity, and average surface roughness increases after the antimicrobially treating by ZnO nanorods, indicating the mechanism of the antimicrobial function. After the interaction of antibacterial reagent and the bacteria, the average surface roughness increases; the elasticity of the surface decreases and becomes out of order; the surface adherence decreases, so as to induce the death of the bacteria.

KEYWORDS

ZnO; nanorods; photocatalytic antimicrobial; AFM

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Author: Wei-dong Liu, Ting Wang, Yue-li Wu, Bao-ku Zhu

Source: http://www.scirp.org/



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