The Study For Effect Of Cicada Wing Surfaces’ Nanostructure And Optimal Structure On Bacterial Cell

Special experimental study found that Clanger cicada (Psaltoda claripennis) wings surface nanostructures can effectively kill some of the adhesion of bacteria on the surface.And the sterilization process is completely a physical effect, does not involve any chemical reaction.This special antibacterial ability to provide the basis for developing new type of antibacterial materials.In this paper, based on the interactions between bacterial cells and nanopatterned surface structures Clanger cicada (Psaltoda claripennis) wings, an elastic mechanical model is proposed to investigate the rupture of bacterial cells. The effect of surface nanoroughness to bacterial cells is evaluated by determining the stretching of cell wall. The calculated results for the stretching of gram-positive and negative bacteria as functions of the geometric parameters of surface structures are obtained and discussed. The theoretical results show that different intensity of bacterial cell walls in a cicada nanostructures on the surface of the tensile deformation have obvious difference, for the most part of gram-negative bacterial cell walls exceeds its capacity, tensile strength can be mechanical rupture occurred. Then set intensity for a given cell, bacteria on nanomaterials burst determined by the surface texture of geometrical parameters. But with the deepening of the research, people expect to make better use of antibacterial materials, thus put forward the optimization structure, namely nanoparticles.The nanoparticles possess unique physico-chemical, optical and biological properties which can be manipulated suitably for practical applications in technology, research and medicine. Meanwhile, various synthetic approaches based on immobilization or release of bactericidal substances was extensively explored to produce antibacterial materials. The confluence of nanotechnology and biology make nanoparticles as potential antimicrobial agents. Although nanoparticles coupled to their unique chemical and physical properties are thought to underlie their exploitable biomedical activities, the mechanism has not been systematacially explained so far. Based on the interactions between bacterial cells and nanoparticles, an elastic mechanical model the action of is proposed. The antibacterial properties of nanoparticles were researched by thermodynamic theory. It is shown that the total energy depicts and then increases, in the process of adsorption on the surface of the nanomaterials. When the total energy reaches a minimum, the bacteria adsorbing on nanomaterials reach stable state. The bacteria adsorbing on nanomaterials is prone to be destroyed with the increase of surface energy. The results present that the topography properties of nanoparticles play a crucial role in anti-microbial.