Theoretical study on the bactericidal nature of nanopatterned surfaces

分类： 生物学 >> 生物物理学 >> 生物力学与生物流变学 提交时间： 2016-05-11

Xue, Fudong Liu, Junjie Guo, Longfang Zhang, Lirong Li, Qianzhong Xue, Fudong

摘要： A natural biomaterial has been discovered with bactericidal activities, which is mainly attributed to its nanopatterned surface structure. The surface of Clanger cicada (Psaltoda claripennis) wings has been identified as a natural bactericidal material, which has lead to the emergence of research on the development of novel antibacterial surfaces. From the interactions between bacterial biofilms and nanopatterned surface structures, a new mechanical model is proposed that investigates the rupture of bacterial cells within the framework of the "stretching" theory. The effect of surface nanoroughness on the survival of bacterial cells is evaluated by determining the stretching ability of their cell walls. The results, calculated using Gram-positive and Gram-negative bacteria as examples, show a correlation between the stretching of the cell wall and the geometric parameters of the surface structures. The theoretical results indicate that for a given cell rigidity, the bactericidal nature of the surface is determined by the geometric parameters of the surface structures. (C) 2015 Elsevier Ltd. All rights reserved.

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