标题：Imaging of surface morphologies of L-arginine trifluoroacetate crystals
作者：X.J. Liu;P.J. Wang;Z. Zhang;D. Xu;G.H. Zhang;X.Q. Wang
作者机构：[Liu, X.J] School of Sciences, University of Jinan, Jinan, 250022, China;[ Wang, P.J] School of Sciences, University of Jinan, Jinan, 250022, China;[ 更多
通讯作者地址：[Liu, XJ]Univ Jinan, Sch Sci, Jinan 250022, Peoples R China.
来源：Current applied physics: the official journal of the Korean Physical Society
关键词：Optical materials;Crystal growth;Atomic force microscopy;Growth morphology
摘要：The growth mechanism and defect-mediated surface morphologies are investigated by atomic force microscopy (AFM). Both screw-dislocation-controlled growth and 2D nucleation growth operate simultaneously during growth. Hollow core locating at the top of spiral hillock validates that the dislocation has a large Burgers vector. 2D nuclei introduce growth islands and steps with wavy fronts are observed. Impurity- induced step bunching is presumably formed as a result of the imbalance of step speed. The formation of the hollow channels is due to instability of the interface and these may ultimately cause other defects such as liquid inclusions come into being.