期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.158301
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资金
- National Science Foundation [CHE0809058]
- EPSRC [GR/T11036/01]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0809058] Funding Source: National Science Foundation
- Engineering and Physical Sciences Research Council [GR/T11036/01] Funding Source: researchfish
Spontaneous spatiotemporal wave activity occurs in groups of excitable particles for groups larger than a critical size. Experiments are carried out with particles loaded with the catalyst of the Belousov-Zhabotinsky reaction that are immersed in catalyst-free reaction mixture. The particles diffusively exchange activator and inhibitor species with the surrounding solution. All particles are nonoscillatory when separated from the other particles; however, target and spiral waves are exhibited in sufficiently large groups. A cellular particle model of the system also exhibits transitions from excitable steady state behavior to spatiotemporal wave activity with increasing group size.
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