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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Effect of gel network on pattern formation in the ferrocyanide-iodate- sulfite reaction
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Effect of gel network on pattern formation in the ferrocyanide-iodate- sulfite reaction

机译：凝胶网络对亚铁氰化物-碘酸盐-亚硫酸盐反应中图形形成的影响

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摘要

Stationary patterns have been researched experimentally since the discovery of the Turing pattern in the chlorite-iodide-malonic acid (CIMA) reaction and the self-replicating spot pattern in the ferrocyanide-iodate-sulfite (FIS) reaction. In this study, we reproduced the pattern formation in the FIS reaction by using poly(acrylamide) gels. Gels with different swelling ratios were prepared to use as a medium. The effect of the swelling ratio was compared with the effect of thickness. It was found that the swelling ratio greatly influenced pattern formation. Oscillating spot patterns appeared at high swelling ratios, and lamellar patterns appeared at a low swelling ratio. Self-replicating spot patterns appeared in between the two areas. The front velocities, which were observed in the initial stage of pattern formation, depended on the swelling ratio. Furthermore, this dependence obeys the free volume theory of diffusion. These results provide evidence that the change in front velocities is caused by a change in diffusion. Pattern formation can be controlled not only by thickness but also by swelling ratio, which may be useful for creating novel pattern templates.
机译：自从在亚氯酸盐-碘化物-丙二酸（CIMA）反应中发现了图灵图谱以及在亚铁氰化物-碘酸盐-亚硫酸盐（FIS）反应中发现了自复制点图谱以来，就已经对固定式进行了实验研究。在这项研究中，我们通过使用聚丙烯酰胺凝胶重现了FIS反应中的图案形成。制备具有不同溶胀率的凝胶以用作介质。将溶胀率的影响与厚度的影响进行比较。发现溶胀率极大地影响图案形成。振荡的斑点图案出现在高溶胀率，而层状图案出现在低溶胀率。自复制斑点模式出现在两个区域之间。在图案形成的初始阶段观察到的前速度取决于溶胀率。此外，这种依赖性遵循了扩散的自由体积理论。这些结果提供了前速度变化是由扩散变化引起的证据。图案形成不仅可以通过厚度来控制，而且可以通过溶胀率来控制，这对于创建新颖的图案模板可能是有用的。

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