technique to study two-dimensional phase transitions. Observations show that a monolayer
of C 60 deposited on an ultrathin WO 2 layer grown on the W (110) surface undergoes a
structural phase transition at 259 K, similar in temperature to that of bulk C 60. In turn, a
kinetic transition has been observed at 220 K, which is significantly higher than that of the
bulk C 60 crystal (90 K). This difference is attributed to interactions between the molecular …