Flexible Prussian Blue-Au Fibers as Robust Peroxidase - Like Nanozymes for Wearable Hydrogen Peroxide and Uric Acid Monitoring

Fiber-based electronics technology has been making significant strides towards applicable emergence into many fields. One such field is the use of fiber-based electronics in the development of smart textiles. Here, we report the use of stretchable styrene-ethylene-butylene-styrene (SEBS) fibers as a conductive substrate to simultaneously load Au nanowire and Prussian blue (PB) as biosensing interfaces. Accordingly, due to the synergistic catalytic effect between Au nanowire and Prussian blue, the as-obtained flexible PB/Au fibers can not only show the potential as wearable biosensors but also serve as high-performance peroxidase-like nanozymes. The functional fibers can be used for colorimetric detection of H2O2 and uric acid, exhibiting satisfactory sensitivity and selectivity in serum sample analysis. The flexible PB/Au fibers represent a new form of Peroxidase-like nanozymes, which could open doors to various wearable biosensing applications.