Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Gating of single molecule junction conductance by charge transfer complex formation
AU - Vezzoli, Andrea
AU - Grace, Iain
AU - Brooke, Carly
AU - Wang, Kun
AU - Lambert, Colin J.
AU - Xu, Bingqian
AU - Nichols, Richard J.
AU - Higgins, Simon J.
PY - 2015/12/7
Y1 - 2015/12/7
N2 - The solid-state structures of organic charge transfer (CT) salts are critical in determining their mode of charge transport, and hence their unusual electrical properties, which range from semiconducting through metallic to superconducting. In contrast, using both theory and experiment, we show here that the conductance of metal vertical bar single molecule vertical bar metal junctions involving aromatic donor moieties (dialkyl-terthiophene, dialkylbenzene) increase by over an order of magnitude upon formation of charge transfer (CT) complexes with tetracyanoethylene (TCNE). This enhancement occurs because CT complex formation creates a new resonance in the transmission function, close to the metal contact Fermi energy, that is a signal of room-temperature quantum interference.
AB - The solid-state structures of organic charge transfer (CT) salts are critical in determining their mode of charge transport, and hence their unusual electrical properties, which range from semiconducting through metallic to superconducting. In contrast, using both theory and experiment, we show here that the conductance of metal vertical bar single molecule vertical bar metal junctions involving aromatic donor moieties (dialkyl-terthiophene, dialkylbenzene) increase by over an order of magnitude upon formation of charge transfer (CT) complexes with tetracyanoethylene (TCNE). This enhancement occurs because CT complex formation creates a new resonance in the transmission function, close to the metal contact Fermi energy, that is a signal of room-temperature quantum interference.
KW - ELECTRON-TRANSPORT
KW - TETRACYANOETHYLENE
KW - CONDUCTIVITY
KW - DERIVATIVES
KW - WIRES
KW - TETRATHIAFULVALENE
KW - RESISTANCE
KW - CHEMISTRY
KW - THIOPHENE
KW - BINDING
U2 - 10.1039/c5nr04420k
DO - 10.1039/c5nr04420k
M3 - Journal article
VL - 7
SP - 18949
EP - 18955
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 45
ER -