无规聚集过程(Irregular aggregation process)的动力学研究,一直是科学界研究的重点课题。因为它是自然界极为普遍的现象,涉及到许多科学领域。例如,天空雷电现象、胶体、金属粉灰(Metal Leaves)、灰尘、烟雾、植物生长、聚合物科学、材料科学、免疫学、相转变以及许多临界现象等的聚集过程,由于其复杂性和无规性,对这类问题的研究存在着困难。1983年以来,国外用计算机模拟处理,初步得到的某些理论模型与实验相符合,目前使用的模型有DLA(diffusion-limited aggregation)和C-C(cluster-cluster aggregation)模型。我们从电解沉积过程的实验中发现从有序的枝状晶体(各向异性)到无序图样(tip-splitting,尖-劈状)发生的条件。从界面扩散的沉积得到了分形图样(DLA过程)。 (一)实验、电解金属锌粉(metal leaves)及镉不可逆二维成 The dynamics of the irregular aggregation process has always been the focus of scientific research. Because it is a very common phenomenon in nature, it involves many fields of science. For example, sky lightning phenomenon, colloids, metal leaves, dust, smoke, plant growth, polymer science, material science, immunology, phase transition and many critical phenomena such as the aggregation process, due to its complexity and no Regulatory, there are difficulties in the study of such issues. Since 1983, some foreign computer simulations have been processed, and some of the preliminary theoretical models are consistent with the experiments. The models currently used include diffusion-limited aggregation (DLA) and cluster-cluster aggregation (C-C) models. We have found from the experiments of the electrodeposition process that the order of dendrite (anisotropy) to disordered pattern (tip-splitting) occurs. The deposition from the interface diffusion gave a fractal pattern (DLA process). (A) experiment, electrolysis of metal zinc (cadmium) and cadmium irreversible two-dimensional