- One is a photosensitive cathode which emits electrons when exposed to light and the other is an anode which is maintained at a positive voltage with respect to the cathode.
- When exposed to ultraviolet light, a photosensitive chemical in the liquid causes the material to harden and encapsulate the cells.
- However, if only the ligand is photosensitive, then light can only influence the metal-ligand binding indirectly.
- The majority of photosensitive molecules have a heterocyclic ring structure similar to that of chlorophyll or hemoglobin.
- Some polymers, such as most polyimides and polycarbonates, are not photosensitive and are typically processed using photoresist patterning and reactive ion etching.