Fig. 5.

Flexible as well as a wearable sensor for detection of small molecules like ascorbic acid, uric acid, and so on. a Fiber-based GF/NiCo₂O₄ sensor for the detection of AA, DA, and UA (source: reprinted from Weihua Cai, Jianwei Lai, Ting Lai, Haoting Xie, Jianshan Ye- Controlled functionalization of flexible graphene fibers for the simultaneous determination of ascorbic acid, dopamine and uric acid, Sensors and Actuators B: Chemical, 224 (2016)225–232, with permission from Elsevier). b Schematic fabrication procedure for preparation of MoS₂ grown on Al foil for detection of UA. (Source: reprinted from Rinky Sha,Nandimalla Vishnu, Sushmee Badhulika-MoS₂ based ultra-low-cost, flexible, non-enzymatic and non-invasive electrochemical sensor for highly selective detection of uric acid in human urine samples, Sensors and Actuators B: Chemical, 279 (2019) 53–60, with permission from Elsevier)