CRYSTAL-GROWTH AND STRUCTURE OF FULLERENE THIN-FILMS

The growth and structure of C-60 and C-70 thin film crystals on alkali halide and layered material substrates are described. It is demonstra ted that fairly large grains can be grown with the specific orientatio n to the substrate lattice, especially on layered substrates. The defe cts in the films fabricated on alkali halides are studied by transmiss ion electron microscopy in detail. The growth mechanism of C-60 and C- 70 thin films on these substrates is discussed on a basis of reflectio n high-energy electron diffraction and atomic force microscopy observa tion and compared with that on other substrates. The unusual growth ch aracteristics of C-60 and C-70 are discussed and compared with those e ncountered in thin films of conventional van der Waals crystals.