A method may include selecting a target level of porosity associated with a graphene trace of an electrochemical sensor, the target level of porosity between 3% and 24%. The method may further include selecting a concentration and a viscosity of a graphene ink based on the target level of porosity. The method may also include selecting at least one printing parameter and at least one sintering parameter based on the target level of porosity. The method may include printing the graphene ink onto a substrate using the number of print passes to form the graphene trace having the target level of porosity. A system may include a substrate and a printed graphene trace having a porosity of between 3% and 24% printed onto the substrate, where the graphene trace defines at least a portion of an electrochemical sensor.
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