4a) reveal that the microbundles with a harsh end and some microtablets adhere to their surfaces are marked by arrows and a square. One of the microtablets is enlarged and its image is shown in Fig. 4b. From the enlarged one, the cross petal shaped lamina connects with each other and forms large structure with a size of about 5 μm; and each “petal” is well crystallized. From Fig. 4c, when the reaction time was prolonged to 9 h, the microtablets disappeared.