In this paper we investigate the dendritic formation of a discotic liquid crystal RHO as well as their growth characters and time evolution. The experiment shows that the dendritic structure of RHO mesophase is sensit...In this paper we investigate the dendritic formation of a discotic liquid crystal RHO as well as their growth characters and time evolution. The experiment shows that the dendritic structure of RHO mesophase is sensitive to the surface treatment, the thickness of the liquid film and the basal wall. The tip speed of the dendrite keeps constant when cooling the sampie continuously. A linear dependence of the tip speed of the dendrite on the cooling rate has been given. In order to explain the contradiction between the experiment and the present simplified theory, we suggest that the thermal fluctuation and dimension play an important role under the condition of far-away-from-the-equilibrium-state and continuous cooling.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘In this paper we investigate the dendritic formation of a discotic liquid crystal RHO as well as their growth characters and time evolution. The experiment shows that the dendritic structure of RHO mesophase is sensitive to the surface treatment, the thickness of the liquid film and the basal wall. The tip speed of the dendrite keeps constant when cooling the sampie continuously. A linear dependence of the tip speed of the dendrite on the cooling rate has been given. In order to explain the contradiction between the experiment and the present simplified theory, we suggest that the thermal fluctuation and dimension play an important role under the condition of far-away-from-the-equilibrium-state and continuous cooling.
