Table 4.
Table of functional materials used for humidity sensing.
| Material | Usage |
|---|---|
| Polyimide | [183,193,228] |
| Polyvinyl alcohol (PVA) | [54,115,162] |
| GO | [9,185,218] |
| Hydrogel | [150,169,185] |
| Agarose | [99,120,165] |
| Gelatin | [37,50] |
| Chitosan | [73,167,188] |
| Poly(diallyldimethylammonium) (PDDA)/poly R-478 | [222] |
| Poly(allylamine hydrochloride) (PAH) and poly(acrylic acid)(PAA) | [92] |
| Hydroxyethylcellulose (HEC)/polyvinylidenefluoride (PVDF) | [91] |
| Zinc oxide (ZnO) | [129,140,216] |
| Tin(IV) oxide (SnO2) | [93,184] |
| Titanium dioxide (TiO2) | [77] |
| Methylene blue/hydroxypropyl cellulose | [149] |
| Photonic cellulose nanocrystals | [16] |
| Poly(vinyl alcohol-co-vinyl acetal)s | [17] |
| Silica gel | [59,78] |
| Silk fibroin | [160] |
| Gold nanoparticles linked by polyethylene glycol | [198] |
| Poly methyl meth acrylate (PMMA) | [162,211,223] |
| Molybdenum disulfide (MoS2) or tungsten disulfide (WS2)-protected titanium | [164,190] |
| Calcium alginate (CaAlg) hydrogel | [169] |
| Niobium disulfide | [169] |
| Sodium silica | [82] |
| Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate in PSS (PEDOT:PSS) in polyvinyl alcohol (PVA) | [67] |
| Polyvinylidene fluoride in dimethyl sulfoxide (DMSO) and hydroxyethyl cellulose (HEC) | [147] |
| Acrylic resin | [177] |
| Carboxymethyl cellulose (CMC)/carbon nanotubes (CNTs) | [178] |
| nickel-doped zinc thin oxide (NZTO) perovskite | [56] |
| Polystyrene (PS) in poly(N-isopropylacrylamide) (PNIPAM) | [185] |
| Spider dragline silk | [186] |
| Polydimethylsiloxane (PDMS) | [187] |
| Poly(allylamine hydrochloride) (PAH)/silica (SiO2) nanoparticles | [17] |
| Graphene quantum dots | [197] |