Amines 1 Band electrode 1 Electrochemical processing 1 Electrochemistry 1 Electrodes 1 Femtosecond laser micromachining 1 Flow rate 1 Fluidic devices 1 High refractive 1 Mach-Zehnder interferometer 1 Mach-Zehnder interferometers 1 Microcavities 1 Microfluidics 1 Microfluidics systems 1 Neurophysiology 1 Optical data processing 1 Optical fiber sensor 1 Optical fibers 1 Picoliters 1 Probes 1 Redox probe Redox reactions 1 Refractive index 1 Refractive index sensing 1 Refractive index sensitivity 1 Single-mode optical fibre 1