Electrode structure Copper oxides 1 Copper-based 1 Critical effects 1 CuO 1 Electrodes 1 Electrons 1 Finite integral method 1 Flexible substrate 1 Glass 1 High-energy particles 1 Humidity sensing 1 Humidity sensors 1 Hybrid photomultiplier tubes 1 Laser direct writing 1 Laser direct-writing 1 Low-costs 1 Monte Carlo methods 1 One-step methods 1 Particles detection 1 Performance 1 Photocathodes 1 Photomultipliers 1 Potential difference 1 Sensing characteristics 1 Shell structure 1 Silicon 1 Transit time spread 1 Wearable sensors 1 Writing technology 1