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SEM images of (a) polydiacetylene (PDA)/graphene film (adapted from reference [140]), and (b) rGO-polythiophene (PTh) hybrid, (c) response of sensors based on PTh and rGO-PTh to different gases at room temperature (adapted from reference [141]), and (d) sensitivity values changes of PS and polyhydroxibutyrate (PHB) doped with 5,10,15,20-tetraphenylporphyrin (H2TPP) and mesoporous graphene to water vapors, toluene and acetic acid (adapted from reference [142]).
