McIlwaine Rachel, Vanag Vladimir K, Epstein Irving R
Department of Chemistry and Volen Center for Complex Systems, MS 015, Brandeis University, Waltham, 02454-9110, USA.
Phys Chem Chem Phys. 2009 Mar 14;11(10):1581-7. doi: 10.1039/b814825b. Epub 2009 Jan 19.
Using temperature as a control parameter, we observe a transition from stationary Turing patterns at T = 15-20 degrees C to traveling waves at T = 50 degrees C (and above) in the Ru(bpy)(3)(2+)-catalyzed Belousov-Zhabotinsky (BZ) reaction incorporated into the water nanodroplets of a water-in-oil aerosol OT (AOT) microemulsion. At constant chemical composition, molar ratio and droplet fraction, the transition takes place via a series of stable patterns, including oscillatory Turing patterns (at 35-40 degrees C) and reversed oscillatory Turing patterns (at 50 degrees C). We attribute the pattern transitions to a temperature-induced percolation transition of the BZ-AOT microemulsion, implying a change from isolated water nanodroplets to a system-spanning network of water channels.
以温度作为控制参数，我们观察到在油包水型气溶胶OT（AOT）微乳液的水纳米液滴中，在Ru(bpy)(3)(2+)催化的Belousov-Zhabotinsky（BZ）反应中，从T = 15 - 20摄氏度时的静态图灵图案到T = 50摄氏度（及以上）时的行波的转变。在恒定的化学成分、摩尔比和液滴分数下，转变通过一系列稳定图案发生，包括振荡图灵图案（在35 - 40摄氏度）和反向振荡图灵图案（在50摄氏度）。我们将图案转变归因于BZ - AOT微乳液的温度诱导渗流转变，这意味着从孤立的水纳米液滴转变为跨系统的水通道网络。
