Adamatzky Andrew, Fullarton Claire, Phillips Neil, De Lacy Costello Ben, Draper Thomas C
Unconventional Computing Laboratory, Department of Computer Science and Creative Technologies, Centre for Research in Biosciences, University of the West of England, Bristol BS16 1QY, UK.
Institute of Biosensing Technology, Centre for Research in Biosciences, University of the West of England, Bristol BS16 1QY, UK.
R Soc Open Sci. 2019 Apr 24;6(4):190078. doi: 10.1098/rsos.190078. eCollection 2019 Apr.
External control of oscillation dynamics in the Belousov-Zhabotinsky (BZ) reaction is important for many applications including encoding computing schemes. When considering the BZ reaction, there are limited studies dealing with thermal cycling, particularly cooling, for external control. Recently, liquid marbles (LMs) have been demonstrated as a means of confining the BZ reaction in a system containing a solid-liquid interface. BZ LMs were prepared by rolling 50 μl droplets in polyethylene (PE) powder. Oscillations of electrical potential differences within the marble were recorded by inserting a pair of electrodes through the LM powder coating into the BZ solution core. Electrical potential differences of up to 100 mV were observed with an average period of oscillation 44 s. BZ LMs were subsequently frozen to -1°C to observe changes in the frequency of electrical potential oscillations. The frequency of oscillations reduced upon freezing to 11 mHz cf. 23 mHz at ambient temperature. The oscillation frequency of the frozen BZ LM returned to 23 mHz upon warming to ambient temperature. Several cycles of frequency fluctuations were able to be achieved.
在包括编码计算方案在内的许多应用中，对贝洛索夫-扎博廷斯基（BZ）反应中的振荡动力学进行外部控制至关重要。在考虑BZ反应时，针对外部控制的热循环，尤其是冷却方面的研究有限。最近，已证明液体弹珠（LMs）是一种在包含固液界面的系统中限制BZ反应的手段。通过在聚乙烯（PE）粉末中滚动50 μl液滴制备了BZ液体弹珠。通过将一对电极穿过液体弹珠的粉末涂层插入BZ溶液核心，记录了弹珠内部电位差的振荡情况。观察到电位差高达100 mV，平均振荡周期为44 s。随后将BZ液体弹珠冷冻至-1°C，以观察电位振荡频率的变化。冷冻后振荡频率降低至11 mHz，相比之下，室温下为23 mHz。将冷冻的BZ液体弹珠升温至室温后，振荡频率恢复到23 mHz。能够实现几个频率波动周期。
