OPTIMIZATION ON THE CRYSTAL-GROWTH OF FULLERENES

Inspecting critically the former vapour growth technique of C-60 singl e crystals from the viewpoint of crystal growth dynamics, we conclude that the conditions should be improved. Both the temperature differenc e distribution throughout the growth process and the temperature distr ibution in the furnace are carefully selected. With this optimization, large C-60 single crystals of good quality with size more than 6 mm c an be grown reproducibly. The Laue's analysis of the crystal show that the exposed surfaces of C-60 solids are of two types of crystalline f aces, namely {111} and {100}.