Table 1.

Recent studies on humidity sensors.

Sensitive Material Type	Sensitive Material	Measurement Parameters	Production Method	Ref.
	GO	Capacitance	Screen printing	[47]
Carbon-based	CGO	Resistance	Electrospinning	[48]
	GO	Capacitance	Microwave plasma-enhanced chemical vapor deposition	[49]
	SnO2/RGO	Capacitance	Electrospinning	[50]
Metallic oxide or sulfide	TiO2	Current/voltage	Anodizing	[51]
	MoS2/PVP	Impedance	Inkjet printing	[52]
	RGO/WS2	Frequency	Sputtering	[53]
	SPEEK	Capacitance/resistance	Electrospinning	[54]
Polymer	PANI/PVDF	Impedance	Heterogeneous in-situ polymerization	[55]
	P(VDF-T rFE)/GF	Capacitance	Screen printing and spin coating	[56]