Baker A, Tóth A, Horváth D, Walkush J, Ali A S, Morgan W, Kukovecz A, Pantaleone J J, Maselko J
Chemistry Department, University of Alaska, Anchorage, USA.
J Phys Chem A. 2009 Jul 23;113(29):8243-8. doi: 10.1021/jp9007703.
Chemical systems that are far from thermodynamic equilibrium may form complex temporal and spatiotemporal structures. In our paper, we present unusual precipitation patterns that have been observed in the system of Cu(II)-oxalate. Starting with a pellet of copper sulfate immersed in or by pumping copper sulfate solution into a horizontal layer of sodium oxalate solution, we have observed the formation of a precipitate ring and an array of radially oriented thin fingers. The development of these patterns is related to the internal structure of the different crystals, the gravity flow, and the circular symmetry of the experimental arrangement.
远离热力学平衡的化学系统可能会形成复杂的时间和时空结构。在我们的论文中，我们展示了在草酸铜系统中观察到的异常沉淀模式。从将硫酸铜小球浸入草酸钠溶液的水平层中，或通过将硫酸铜溶液泵入草酸钠溶液的水平层开始，我们观察到了沉淀环和一系列径向排列的细指状物的形成。这些模式的发展与不同晶体的内部结构、重力流以及实验装置的圆对称性有关。
