Structural Regulation of Mechanical Gating in Molecular Junctions

Biswajit Pabi, Jakub Šebesta, Richard Korytár, Oren Tal, Atindra Nath Pal

Research output: Contribution to journalArticlepeer-review

Abstract

In contrast to silicon-based transistors, single-molecule junctions can be gated by simple mechanical means. Specifically, charge can be transferred between the junction’s electrodes and its molecular bridge when the interelectrode distance is modified, leading to variations in the electronic transport properties of the junction. While this effect has been studied extensively, the influence of the molecular orientation on mechanical gating has not been addressed, despite its potential influence on the gating effectiveness. Here, we show that the same molecular junction can experience either clear mechanical gating or none, depending on the molecular orientation in the junctions. The effect is found in silver-ferrocene-silver break junctions and analyzed in view of ab initio and transport calculations, where the influence of the molecular orbital geometry on charge transfer to or from the molecule is revealed. The molecular orientation is thus a new degree of freedom that can be used to optimize mechanically gated molecular junctions.

Original languageEnglish
Pages (from-to)3775-3780
Number of pages6
JournalNano Letters
Volume23
Issue number9
DOIs
StateAccepted/In press - 2023

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • Mechanical Engineering
  • Bioengineering
  • General Materials Science

Fingerprint

Dive into the research topics of 'Structural Regulation of Mechanical Gating in Molecular Junctions'. Together they form a unique fingerprint.

Cite this