Fig. 17
From: Roles of MXenes in biomedical applications: recent developments and prospects
a Schematic diagram of the "hospital-on-a-chip" concept. b (i) Schematic representation of bioelectrical signal transmission from the neuron to the electrode or vice versa. (ii) Photograph of a PLA microneedle. (iii) Image of a close look of the tiny needles. c Photographs of wearable microneedle electrodes. Reproduced with permission from Ref. [171], © American Chemical Society 2021. d Schematic illustration of the fabrication of a conductive, anti-freezing, and self-healing conductive MXene nanocomposite organohydrogel (MNOH). e The experiment of self-healing. (I)The self-healing behavior between the original MNOH (black) and the MNOH dyed with rhodamine (red). (II) Time evolution of the healable process for the conductive MNOH by the real-time resistance measurements. (III) A circuit comprising MNOH in series with a red LED indicator: (i) original, (ii) completely bifurcated, (iii) self-healed, and (iv–vi) the corresponding schematic diagrams of the circuit. Reproduced with permission from Ref. [172], © John Wiley and Sons 2021