  A gas free analogue of the Belousov-Zhabotinsky reaction catalysed by ferroin
and encapsulated in phospholipid stabilised vesicles is reported. A reaction
mixture which exhibits spontaneous oscillation and excitation transfer between
vesicles was formulated. By adjusting the reagent concentrations a quiescent
state with fewer spontaneous oscillations was achieved. Using relatively low
power laser sources of specific wavelengths (green 532nm and blue 405nm) it was
shown that waves could be reproducibly initiated within the BZ vesicles.
Furthermore, despite the reduced excitability of the system overall the
initiated waves exhibited vesicle to vesicle transfer. It was possible to
manipulate single vesicles and design simple circuits based on a 2D validation
of collision based circuits. Therefore, we conclude that this BZ system
exhibits promise for computing applications based on 3D networks of vesicles.
