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根据含杂质熔融玻璃表面金原子凝聚的实验规律,在原子团簇具有随机的线扩散步长和刚性转动角的特征条件下,建立了含杂质无格点基底表面上改进的杂质限制团簇-团簇(IRCCA)凝聚模型.对团簇的扩散、刚性转动以及凝聚全过程进行了计算机模拟,系统地研究了杂质区域分布情况对分枝状凝聚体诸多特性的影响.结果表明规则分布的杂质对凝聚体生长的影响比随机分布的杂质大,导致杂质规则分布的基底表面上的分枝状凝聚体的数密度更大,分枝状凝聚体的回旋半径,凝聚体平均大小及分形维数更小.
According to the experimental rules of agglomeration of gold atoms on the surface of molten glass containing impurities, an improved impurity-restricted cluster-group on the surface of the substrate with impurities and lattice was established under the characteristic of random cluster diffusion step and rigid rotation angle. (IRCCA) cohesion model was used to simulate the whole process of diffusion, rigid rotation and agglomeration of clusters, and systematically studied the influence of the distribution of impurity regions on many characteristics of dendritic aggregates.The results showed that the regular distribution of impurity pairs The effect of aggregate growth is greater than that of randomly distributed impurities, resulting in a more dense population of dendritic aggregates on the substrate surface with regular impurity distributions, a greater degree of gyration radius of the dendritic aggregates, an average size of aggregates, and a more fractal dimension small.