Investigations of Printed Flexible pH Sensing Materials Based on Graphene Platelets and Submicron RuO₂ Powders

Table 2

Sensors’ sensitivity before and after 10,000 cycles of bending.

RuO2 content [wt%]	Sensitivity [mV⋅pH^−1]		Sensitivity change
	Before	After
10%	−29.83	−13.14	56.0%
20%	−26.03	−18.82	27.7%
30%	−27.86	−30.41	−9.2%
40%	−46.01	−46.26	−0.5%
50%	−42.90	−34.26	20.1%
60%	−46.17	−50.61	−9.6%