Photoswitchable redox-activated monolayers on electrode supports act as mol
ecular electronic systems for the electronic transduction of recorded photo
nic information. Photoisomerizable monolayers assembled on electrodes may a
ct as command interfaces far controlling interfacial electron transfer and
thus act as interfaces for the amperometric transduction of photonic signal
s recorded by the monolayer. Photoswitchable biomaterials assembled on elec
tronic transducers represent novel optobioelectronic systems. This is exemp
lified by the organization of a photoswitchable enzyme for the amplified am
perometric transduction of photonic signals, and by the tailoring of revers
ible immunosensor systems.