Triazatriangulene as binding group for molecular electronics

TY - JOUR

T1 - Triazatriangulene as binding group for molecular electronics

AU - Wei, Zhongming

AU - Wang, Xintai

AU - Borges, Anders Christian

AU - Santella, Marco

AU - Li, Tao

AU - Sørensen, Jakob Kryger

AU - Vanin, Marco

AU - Hu, Wenping

AU - Liu, Yunqi

AU - Ulstrup, Jens

AU - Solomon, Gemma

AU - Chi, Qijin

AU - Bjørnholm, Thomas

AU - Nørgaard, Kasper

AU - Laursen, Bo Wegge

PY - 2014/12/16

Y1 - 2014/12/16

N2 - The triazatriangulene (TATA) ring system was investigated as a binding group for tunnel junctions of molecular wires on gold surfaces. Self-assembled monolayers (SAMs) of TATA platforms with three different lengths of phenylene wires were fabricated, and their electrical conductance was recorded by both conducting probe-atomic force microscopy (CP-AFM) and scanning tunneling microscopy (STM). Similar measurements were performed for phenylene SAMs with thiol anchoring groups as references. It was found that, despite the presence of a sp3 hybridized carbon atom in the conduction path, the TATA platform displays a contact resistance only slightly larger than the thiols. This surprising finding has not been reported before and was analyzed by theoretical computations of the transmission functions of the TATA anchored molecular wires. The relatively low contact resistance of the TATA platform along with its high stability and directionality make this binding group very attractive for molecular electronic measurements and devices. (Figure Presented).

AB - The triazatriangulene (TATA) ring system was investigated as a binding group for tunnel junctions of molecular wires on gold surfaces. Self-assembled monolayers (SAMs) of TATA platforms with three different lengths of phenylene wires were fabricated, and their electrical conductance was recorded by both conducting probe-atomic force microscopy (CP-AFM) and scanning tunneling microscopy (STM). Similar measurements were performed for phenylene SAMs with thiol anchoring groups as references. It was found that, despite the presence of a sp3 hybridized carbon atom in the conduction path, the TATA platform displays a contact resistance only slightly larger than the thiols. This surprising finding has not been reported before and was analyzed by theoretical computations of the transmission functions of the TATA anchored molecular wires. The relatively low contact resistance of the TATA platform along with its high stability and directionality make this binding group very attractive for molecular electronic measurements and devices. (Figure Presented).

U2 - 10.1021/la504056v

DO - 10.1021/la504056v

M3 - Journal article

C2 - 25426950

SN - 0743-7463

VL - 30

SP - 14868

EP - 14876

JO - Langmuir

JF - Langmuir

IS - 49

ER -