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(a) Structure of MXene/PANI/BC aerogel for the applications of e-skins and gas sensors. (b) Response of the MXene/PANI/BC composite aerogel-based gas sensor of NH3 gas. (c) Scheme of PDMS-encapsulated ionic hydrogel and PDMS-encapsulated PVA-G-FeCl3 and PVA-G hydrogel. (d) The PVA-G-FeCl3/PDMS hybrid hydrogel for human motion monitoring, reprinted with permission [92,93], copyright © American Chemical Society and © MDPI, respectively.
