Lap Crystal And Mmtc Crystals Surface Morphology And Growth Mechanism

Crystal growth is an old and complicated subject. Series of theories and models about crystal growth have been concluded during the long research and practice history, which makes us have a relative profound and general understanding about crystal growth. The study objects of crystal growth are various and crystal growth itself is influenced by many factors. Therefore, up to date, there is no theory that could explain the practical crystal growth of all the crystals. Crystal growth theory is the rule that is deduced from the practice of crystal growth. Only through studying growth process of more and more crystals, we can sum up the widely applied rules and make the crystal growth theory more perfect.High-tech equipments play a very important role in the research of crystal growth. Atomic force microscopy (AFM), a relatively new and powerful tool for surface analysis, had been successfully invented with the development of science and technology. It works based on a senstive tip scanning over the surfaces to test the atomic force between the tip and the surfaces. AFM can work in air and liquids, which provides us an opportunity to observe in-situ and ex-situ the growth surfaces and understand the growth mechanisms at a nanometer scale. The advent of AFM had led to direct confirmation of many traditional crystal growth theory as well as discovery of new crystal growth phenomena, which enrich and develop the crystal growth theory.L-arginine phosphate monohydrate (LAP) crystal and manganese mercury thiocyanate (MMTC) crystal are chosen as the AFM study objects in the thesis. Further knowledge about the growth morphology and mechanisms of these crystals can be obtained by AFM investigations, which will contribute to the crystal growth theory. The...