Electrochemically deposited Pd islands on an organic surface: the presence of Coulomb blockade in STM I(V) curves at room temperature.
Palladium islands with a thickness of a few monolayers were deposited on top of a self-assembled monolayer (SAM) fabricated from 4-mercaptopyridine. In the I(V) curves obtained using the scanning tunneling microscope (STM) clearly the signature of Coulomb blockade is observed, explicitly demonstrating that these islands are coupled to the underlying gold substrate only via a tunneling barrier; this spectroscopic feature also allows to distinguish the palladium islands from similar morphological features present on the gold substrate prior to palladium deposition.
Shekhah
O
O
Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, D-44780, Bochum, Germany.
Busse
C
C
Bashir
A
A
Turcu
F
F
Yin
X
X
Cyganik
P
P
Birkner
A
A
Schuhmann
W
W
Wöll
Ch
Ch
D000327:Adsorption; D003460:Crystallization / Q000379:methods*; D017097:Electric Impedance; D004595:Electroplating / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008839:Microelectrodes; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D009930:Organic Chemicals / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D010316:Particle Size; D055672:Static Electricity; D013499:Surface Properties; D013696:Temperature
D009930:Organic Chemicals; D010165:Palladium