THIN-FILMS OF C-60 DOPED WITH PB

In the present work we report the synthesis of thin films of C-60 dope d with Pb. By characterization we found that small quantities of Pb in creases the electrical conductivity, giving as a result a semiconducti ng-like behavior in the range of temperatures from 2 K to 470 K. At hi gher content of Pb, the system tends to form particles of Pb. In this case, the electrical resistance shows a metallic-like transition below 7 K, but we did not observe zero resistance up to 2 K. We also found that the films readily reacts upon exposure to the laboratory atmosphe re.