TY  - JOUR
AU  - Mennicken, Max
AU  - Peter, Sophia K.
AU  - Kaulen, Corinna
AU  - Simon, Ulrich
AU  - Karthäuser, Silvia
TI  - Transport through Redox-Active Ru-Terpyridine Complexes Integrated in Single Nanoparticle Devices
JO  - The journal of physical chemistry  / C C, Nanomaterials and interfaces
VL  - 124
IS  - 8
SN  - 1932-7455
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2020-01397
SP  - 4881 - 4889
PY  - 2020
AB  - Transition metal complexes are electrofunctional molecules due to their high conductivity and their intrinsic switching ability involving a metal-to-ligand charge transfer. Here, a method is presented to contact reliably a few to single redox-active Ru-terpyridine complexes in a CMOS compatible nanodevice and preserve their electrical functionality. Using hybrid materials from 14 nm gold nanoparticles (AuNP) and bis-{4′-[4-(mercaptophenyl)-2,2′:6′,2″-terpyridine]}-ruthenium(II) complexes a device size of 302 nm2 inclusive nanoelectrodes is achieved. Moreover, this method bears the opportunity for further downscaling. The Ru-complex AuNP devices show symmetric and asymmetric current versus voltage curves with a hysteretic characteristic in two well separated conductance ranges. By theoretical approximations based on the single-channel Landauer model, the charge transport through the formed double-barrier tunnel junction is thoroughly analyzed and its sensibility to the molecule/metal contact is revealed. It can be verified that tunneling transport through the HOMO is the main transport mechanism while decoherent hopping transport is present to a minor extent.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000517672900057
DO  - DOI:10.1021/acs.jpcc.9b11716
UR  - https://juser.fz-juelich.de/record/874375
ER  -