“…[9][10][11] A large sensing range and low detection limit are two pivotal parameters for human health monitoring, and both are required because small strain, such as surface muscles and phonation, and large strain, such as joint movement, occur simultaneously in the human body. Therefore in order to enhance the stretchability and improve the sensing range, various materials based on carbon and other types of conductive fillers, such as carbon black (CB), [12][13][14][15][16] carbon nanotubes (CNTs), 2,4,[17][18][19][20] carbon nanofibers (CNFs), 21,22 graphene (and its derivatives), 17,22,23 1D Ag NWs, 24 and newly developed 2D MXenes, [25][26][27][28] have been hybridized with flexible polymer substrates, such as polydimethylsiloxane (PDMS), 13,17,18,21 thermoplastic polyurethane (TPU), 2,4,12,19,20 and silicon-based rubber (NBR), 14,15 to form conductive flexible composites (CFCs).…”