Titanium Dioxide-Based 𝟔𝟒^∘ YX LiNbO₃ Surface Acoustic Wave Hydrogen Gas Sensors

Table 1

Values of thickness, refractive index, and porosity of TiO₂ and TiO₂-Au films measured by ellipsometry.

Samples	Film thickness	Refractive index	Porosity
	(nm)	at 589 nm	(%)
TiO2 at 300^°C	48	2.09	37
TiO2-Au at 300^°C	48	2.14	33