The elastic modulii of evaporated C60 films

Surface acoustic wave (SAW) pulscs cvcrc cxcitctl in C60 films on a variety of substratcs using pulscs from Excimcr lasers for cxcitation. An optical beam deflection technique and polymer elcctrct transduccrs tvcrc utilizcd to detect the propagation of the SAW pulsc with high spatial and tcmporal resolution, allowing an accuracy of bcttcr than O.lfl/o for SAW velocity mcasuremcnts. With this technique the frequency dependellcc of the SAW vclocity was dctcrrnincd for fullcritc films and density, as well as clastic modulii o f thc films wcrc dcrivctl by a thcorctical analysis of the dispersion cffcct.