Fig. 6

A Schematic representation of the preparation of GOD MPs (left) and the working electrode of the biosensor (center); photographs of the original GHM, the prepared enzyme electrode and the deformed electrode (right). B In-vivo test in rats. An image of the glucose biosensor attached to a rat's skin (left); current responses from the implanted sensor following glucose (middle) and insulin injections (right). Reprinted with permission from Ref. [158]. C Schematic diagram of a microneedle-based biosensor array for simultaneous monitoring of lactate and glucose in artificial interstitial fluid. Reprinted with permission from Ref. [160]. D Photo of wearable biosensors for monitoring sweat glucose and surface electromyography. Reprinted with permission from Ref. [169]. E Schematic diagram of a non-invasive blood glucose sensor using two textile-like electrodes (left) and ISF extraction through the reverse iontophoresis (RI) process (right). Reprinted with permission from Ref. [177]. F Schematic representation of the SWCNT/rGO/CoP preparation (left), characterizations (middle) and electrocatalysis processes and signals generated (right). Reprinted with permission from Ref. [177]. G Photo of the smart diaper and schematic diagram of the working process. Reprinted with permission from Ref. [182]