Phase separation of a C-60-C-70 binary mixture at 1:1 composition on C
u(lll) surface was studied after quenching from a 2D fluid temperature
. Because of the shape difference, C-70 molecules were imaged differen
tly from C-60 in STM images. Highly non-linear and irreversible phenom
ena due to late stage growth were observed, revealing a time dependent
order parameter. The correlation function and its 2D Fourier transfor
m were calculated for annealing times at 400 degrees C. Time dependenc
e of the structure factor was calculated.