Testing of reproducibility
To check the reproducibility and sensitivity of printing substrate we prepared 50 identical biosensor samples containing titania layer. 5 µl of 1% H2O2 was applied on each sample and in 2 minutes the reacted zone was measured by the adsorption method of diffuse reflection in the range from 200 to 800 nm. At the end of the experiment the adsorption value of 50 samples was compared.