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

Table 1

Compositions of screen printing RuO₂/GNP/PMMA pastes for pH-sensitive layers.

Paste	RuO2 content, wt%	Graphene paste 12 wt%, g	RuO2, g
1	10	1.8	0.2
2	20	1.6	0.4
3	30	1.4	0.6
4	40	1.2	0.8
5	50	1.0	1.0
6	60	0.8	1.2