Research On The Architecture And Active Sening-layer Design Of Graphene Oxide

With the development of intelligent science and technology,the use of computer to undertake production activities in human activities has gradually become mainstream.In the intelligent measurement and control system,an intelligent monitoring system applied to human physiological signal detection requires a flexible wearable electronic skin.Traditional devices based on silicon materials are increasingly unable to meet the growing needs.The new material,graphene and its derivatives,is an ideal material for flexible sensors.In order to extend advantages of the material.The structural design of the electronic sensing film requires a more elaborate design.In view of some of the above key issues,firstly,a special microstructure film based on graphene oxide was studied and designed.On the one hand,the unidirectional and bidirectional wrinkled reduced graphene oxide(rGO)films were investigated and prepared,and their electrical properties and structures were characterized.Secondly,based on the wrinkled structure,works focus on continuing to design and preparing a gradient wrinkled rGO film with hierarchical structure for the construction of flexible electronic film sensor.And based on the speciality of laser reduction,the thermal construction of the GO sheet by the laser is skillfully utilized.The sensor film with 3D-rGO microstructure by synergistic induction of laser and wrinkle force was prepared and applied to flexible sensors.The main findings are as follows:(1)A flexible stretchable pressure sensor based on wrinkle rGO film was designed and prepared.In view of the problem of poor stretchability of graphene film,this paper is based on the macroscopic thinking of the natural wrinkle structure,and realizes the high tensile elongation of the graphene film on the macroscopic scale by using a large number of micro-wrinkles.The wrinkled GO film was reduced,and the structure,electrical properties and tensile conductivity were characterized.As a result,the film structure has excellent anisotropic and isotropic wrinkle structures.(2)A gradient wrinkled film sensor based on graphene-based hierarchical structure was designed and prepared.In view of the lack of sensitivity performance of graphene film sensor and the large amount of sensor integration in area domain position monitoring,this work explores the effect of hydrazine hydrate on the sheet structure of rGO.Combining with the thickness difference of the GO on the direction of the wrinkle ridge,a thin film sensor was prepared with high sensitivity of 179 kPa-1 and the detection limit of 42 Pa.According to the characterization of the structure,the rGO layer has great expansion among the rGO sheets.Microstructures with different scales were obtained on the surface.In addition,the sensing mechanism was analyzed and the advantages of gradient wrinkles in position detection of sensing films were demonstrated.(3)A 3D-rGO film sensor based on the construction of laser and wrinkle force was designed and fabricated.In order to continue to explore the design of the graphene interlayer structure,the thermal construction of GO film during the reduction process by laser was used to change the degree of reduction and strength on the laser writing path,combining with the formation of wrinkles.The process features a ridge different from ordinary graphene wrinkles on the laser writing path.And this type of film based on the programmability of the laser can obtain the feasible design of the surface structure.The microstructure of the film was characterized and the sensor was applied to the multi-detection of human limbs.