A biosensor for glucose early-warning system application is developed using patterned Janus fabrics and non-enzymatic compositions with strong catalytic activity.
In order to overcome the drawbacks of the convergence time boundary dependent on tuning parameters in existing finite/fixed-time cooperative guidance law, this paper presents a three-dimensional prescribed-time pinning group cooperative guidance scheme that ensures multiple unpowered missiles to intercept multiple stationary targets. Firstly, combining a prescribed-time scaling function with pinning group consensus theory, the prescribed-time consensus-based cooperative guidance law is proposed. Secondly, the prescribed-time convergence of the proposed pinning group consensus-based cooperative guidance law proves that the convergence can be achieved at a specified time, regardless of initial conditions and parameters. Furthermore, the design steps including two stages of the proposed guidance law are given for engineering application. Extensive simulations are carried out in three cases to verify the properties. Simulation results show the effectiveness and superiority of the proposed prescribed-time consensus-based cooperative guidance scheme.
Nanocomposites consisting of two-dimensional (2D) functional reinforcements embedded in a polymeric matrix provide great opportunities for the design of multifunctional artificial materials. However, the efficient formation of materials with high-performance structures and multifunctional properties is still challenging. Herein, we demonstrate a generic approach to fabricate multifunctional poly(vinyl alcohol) (PVA)-based nanocomposite films through a solvent evaporation method with modified graphene oxide (GO) nanosheets as the functional fillers. Inspired by the lubricating protein lubricin (LUB), anchored bottlebrush polymers (BBPs) were designed as a molecular glue to maintain the bottlebrush conformation immobilized on the GO nanosheets, thereby dominating the directed assembly of GO nanosheets in a PVA matrix. The BBPs have polyzwitterionic brushes which provide a strongly bound hydrated layer and antifouling property and mussel-mimetic anchors which strongly anchor the copolymer to the GO surface. Furthermore, polyzwitterion-containing BBPs tightly combined with PVA chains act as a bridge for linking the GO nanosheets and the PVA matrix. The highly hydrated bottlebrush architecture mediates repulsion between the adjacent GO surfaces, yielding the well-dispersed and aligned GO nanosheets in the nanocomposites. The fabulous coupling of a layered arrangement of GO nanosheets and highly hydrated polyzwitterionic bottlebrushes of BBPs enables the resultant BBPs@ GO/PVA nanocomposite film to exhibit a high photothermal efficiency (55.1%), UV resistance, and an exceptional gas barrier (84.8% decrease) at low modified-GO loadings as well as a superior antimicrobial property. This study provides a new approach for designing multifunctional nanocomposites with ordered structures and giving great promise to various applications.
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