摘要
对于二聚合物类(dimer)的双粒子的扩散限制聚集生长(Diffusion-Limited-Aggregation,DLA)现象,我们研究了在不同的边界范围释放双粒子所聚集的粒子簇(cluster),发现对于由相同类粒子即无极性粒子构成的双粒子生成的粒子簇的分形(fractal)维数随释放边界离粒子簇中央距离的减少而增大,而且粒子簇形貌更加紧致(compact),但对于由不同类粒子即有极性粒子构成的双粒子簇,其分形维数变化无规律,有极性双粒子的 DLA 是一种新的模拟模型。
Clusters formed by the release of dimers via the DLA (Diffusion-Limited-Aggregation)growth is stud- ied on the various boundary regions.It has been discovered that the fractal dimensionality of clusters formed by homogeneous particles incearses with the decrease in the distance between the centers of the clusters,and the morphology of the clusters appears more compact.However,for heterogeneous clusters formed by polar particles, the change in fractal dimensionality irregular.Thus the DLA of polar dimers represents a new type of aggregation model.
关键词
DLA
双粒子
自身调节
DLA
dimer
cluster
fractal dimensionality
