TITLE

Room temperature negative differential resistance of a monolayer molecular rotor device

AUTHOR(S)
Mei Xue; Kabehie, Sanaz; Stieg, Adam Z.; Tkatchouk, Ekaterina; Benitez, Diego; Stephenson, Rachel M.; Goddard, William A.; Zink, Jeffrey I.; Wang, Kang L.
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p093503
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An electrically driven molecular rotor device comprised of a monolayer of redox-active ligated copper compounds sandwiched between a gold electrode and a highly doped P+Si substrate was fabricated. Current-voltage spectroscopy revealed a temperature-dependent negative differential resistance (NDR) associated with the device. Time-dependent density functional theory suggests the source of the observed NDR to be redox-induced ligand rotation around the copper metal center, an explanation consistent with the proposed energy diagram of the device. An observed temperature dependence of the NDR behavior further supports this hypothesis.
ACCESSION #
44066586

 

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