  This paper reports on a new method of encapsulating BZ solution droplets in a
powder coating of either polyethylene (PE) or polytetrafluoroethylene (PTFE),
to produce BZ liquid marbles (LMs). The BZ LMs have solid--liquid interfaces in
contrast to the previously reported BZ encapsulation systems used to study
pattern formations and wave transfers, such as BZ emulsions and BZ vesicles.
All these systems are important to study as they can be seen as analogues for
information transfer in excitable systems in nature. Due to the powder coating
of the LMs, LMs do not wet the underlying substrate, making the LMs mobile,
enabling them to be easily arranged in arrays. The preparation of complex LMs,
containing an acidic oscillating solution, proves the resilience of LMs and
their application in transporting a wide range of chemical cargoes and in
playing a mediating role in chemical reactions. PTFE-coated LMs were harder to
prepare and not as robust as PE-coated LMs, therefore oscillation studies of BZ
LMs positioned in arrays only focused on PE-coated LMs. Sporadic transfer of
excitation waves was observed between LMs placed in close proximity to each
other in ordered and disordered arrays, suggesting the transfer of liquid
species possibly arises from contact between imperfectly coated areas at the
LM--LM interface or capillary action, where solution is actively transported to
the marble surface through the coating. Propagation pathways of the excitation
waves in both the disordered and ordered arrays of BZ LMs are reported. These
results lay the foundations for future studies on information transmission and
processing arrays of BZ LMs, in addition to observing BZ wave propagation in a
LM and the effect of other physical stimuli such as heat, light and chemical
environments on the dynamics of excitation in arrays of BZ Lms.
