%0 Journal Article
%A Mennicken, Max
%A Peter, Sophia K.
%A Kaulen, Corinna
%A Simon, Ulrich
%A Karthäuser, Silvia
%T Transport through Redox-Active Ru-Terpyridine Complexes Integrated in Single Nanoparticle Devices
%J The journal of physical chemistry  / C C, Nanomaterials and interfaces
%V 124
%N 8
%@ 1932-7455
%C Washington, DC
%I Soc.
%M FZJ-2020-01397
%P 4881 - 4889
%D 2020
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000517672900057
%R 10.1021/acs.jpcc.9b11716
%U https://juser.fz-juelich.de/record/874375