Mechanical Tuning of Through-Molecule Conductance in a Conjugated Calix[4]pyrrole

Journal article (2018)

Authors

D. Stefani Kavli institute of nanoscience Delft, QN/van der Zant Lab - AS
M.L. Perrin Kavli institute of nanoscience Delft, QN/van der Zant Lab - AS
Katsuhiko Ariga National Institute for Materials Science
Ismael Díez-Pérez King’s College London
H.S.J. van der Zant QN/van der Zant Lab - AS , Kavli institute of nanoscience Delft
Diana Dulic Universidad de Chile
Jonathan P. Hill National Institute for Materials Science
C.A. Gutiérrez Cerón Universidad de Chile
Albert C. Aragonès King’s College London
J. Labra Muñoz Universidad de Chile
Rodrigo D.C. Carrasco Universidad de Chile
Yoshitaka Matsushita National Institute for Materials Science
Zdenek Futera University College Dublin
Jan Labuta National Institute for Materials Science
Thien H. Ngo National Institute for Materials Science
Research Group
QN/van der Zant Lab (AS) (TU Delft)
Copyright: © 2018 D. Stefani, M.L. Perrin, C.A. Gutiérrez Cerón, Albert C. Aragonès, J. Labra Muñoz, Rodrigo D.C. Carrasco, Yoshitaka Matsushita, Zdenek Futera, Jan Labuta, Thien H. Ngo, Katsuhiko Ariga, Ismael Díez-Pérez, H.S.J. van der Zant, Diana Dulić, Jonathan P. Hill
DOI
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https://doi.org/10.1002/slct.201801076
Single molecule Calix[4]pyrrole Mechanically-controlled break junction Oxoporphyrinogen
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Published Date

2018

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/van der Zant Lab

Abstract

A conformationally flexible calix[4]pyrrole possessing a conjugated electronic structure (an N-substituted oxoporphyrinogen (OxP) related to porphyrin) was used to investigate the influence of mechanical stretching on the single-molecule conductance of these molecules using the mechanically-controlled break junction (MCBJ) technique. The results show that the molecule can be immobilized in a single-molecule break junction configuration, giving rise to different behaviours. These include step-like features in the conductance vs. displacement traces as well as conductance traces that exhibit a slower decay (‘downhill’ traces) than measured for direct tunneling. The latter class of traces can be associated with the mechanical manipulation (i. e., stretching) of the molecule with inter-electrode distances as long as 2 nm. Density functional theory (DFT) calculations reveal that OxP molecules are stable under stretching in the length regime studied.