Single-Molecule Break Junctions Based on a Perylene-Diimide Cyano-Functionalized (PDI8-CN2) Derivative

Riccardo Frisenda, Loredana Parlato, Mario Barra, Herre S J van der Zant, Antonio Cassinese

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

In this letter, we report the single-molecule conductance properties of a cyano-functionalized perylene-diimide derivative (PDI8-CN2) investigated with gold nano-electrodes. This molecule is of large interest for the fabrication of high-performance and air-stable n-type organic field-effect transistors. Low-bias experiments performed on mechanically controllable break junctions reveal the presence of two different values of the single-molecule conductance, which differ by about two orders of magnitudes. Up to date, this feature was never observed for other perylene-diimide compounds having alternative chemical moieties attached to the basic aromatic core. Theoretical calculations suggest that the highest single-molecule conductance value here observed, comprised between 10−2 and 10−3 G0, is related to a charge transport path directly linking the two cyano groups.

Original languageEnglish
Article number305
JournalNanoscale Research Letters
Volume10
Issue number1
DOIs
Publication statusPublished - 2015

Keywords

  • Break junctions
  • Conductance
  • Density functional theory
  • Perylene-diimide molecules
  • Single molecule

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