Very thin Nylon 11 films (less than or equal to 20 nm in thickness) contain
ing Au nanoparticles were prepared, and current-voltage (I-V) characteristi
cs in the vertical direction of the films were studied. The plan and cross-
sectional transmission electron microscopic images revealed that Au particl
es are spontaneously aligned in the middle of the upper and lower electrode
s and Nylon 11 tunneling barriers are naturally formed between Au nanoparti
cles and electrodes. Clear Coulomb staircases were observed in the I-V char
acteristics. (C) 2000 Elsevier Science S.A. All rights reserved.