Development Of Self-Powered Biosensor And Sterilization Technology For Marine Corrosive Microorganisms Based On Triboelectric Nanogenerator

The microorganism-related corrosion and fouling problems bring serious safety hazards and economic losses to marine economy.According to the statistics,the corrosion loss caused by microbiologically influenced corrosion(MIC)accounts for about 20% of the total corrosion loss.Therefore,the development of effective and convenient microbial detection and sterilization device is of great significance.At present,the microbial detection and sterilization device is still limited by complex instruments and external power supply.Solar energy and wind energy harvesting technologies are influenced by environmental factors such as weather and time,thus their output performance is limited.As a new energy collection technology,triboelectric nanogenerator(TENG)possesses the characteristics of simple structure,low cost,easy fabrication et al.These merits of TENG result it can serve as a solid platform to develop self-powered microbial detection and sterilization devices.However,it is still difficult to design TENG-based microbial detection and disinfection devices rationally.In view of this,this work studies the combination of TENG and biosensor/low temperature plasma technology to develop a self-powered microbial detection/sterilization device.The main research contents are as follows:(1)Based on the characteristics of TENG and the specific binding ability of Concanavalin A(Con A)to Gram-negative bacteria,a biosensor system with high sensitivity and specificity was designed to detect Gram-negative bacteria.Furthermore,by adopting molecular dynamics simulations,the interactions between Con A and lipopolysaccharide were studied.In addition,the portable microbial detection device was designed for intuitively display the detection result.Overall,achieved rapid microbial detection by LED.(2)Based on the high output characteristic of the rotary triboelectric nanogenerator(R-TENG),a plasma excitation was designed.The influence of the logarithm of interdigital electrodes on the output voltage of R-TENG was studied,and the argon gas and voltage multiplier circuit were introduced into the system to make it easier to excite plasma.By the detection of active substances,this work has demonstrated that the improved plasma excitation device can generate more active substances and shows its potential in sterilization applications.(3)Development of self-powered plasma sterilization technology,the sterilization effect of R-TENG-based self-powered sterilizer on different kinds of bacteria were studied.The results indicate that the self-powered sterilization device with reasonable design is able to kill Pseudomonas aeruginosa and Staphylococcus aureus effectively.In addition,the mechanism of self-powered sterilization was studied,the result indicating that the high sterilization effect with the combined effect of the electric field,ultraviolet rays,and active substances.This study not only provides valuable information for microorganism-related corrosion and fouling problems but also sheds light on the application of TENG in the marine environment.