Charge transport characteristics of diarylethene photoswitching single-molecule junctions

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Youngsang Kim - , Universität Konstanz (Autor:in)
  • Thomas J. Hellmuth - , Karlsruher Institut für Technologie (Autor:in)
  • Dmytro Sysoiev - , Universität Konstanz (Autor:in)
  • Fabian Pauly - , Karlsruher Institut für Technologie (Autor:in)
  • Torsten Pietsch - , Universität Konstanz (Autor:in)
  • Jannic Wolf - , Universität Konstanz (Autor:in)
  • Artur Erbe - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Thomas Huhn - , Universität Konstanz (Autor:in)
  • Ulrich Groth - , Universität Konstanz (Autor:in)
  • Ulrich E. Steiner - , Universität Konstanz (Autor:in)
  • Elke Scheer - , Universität Konstanz (Autor:in)

Abstract

We report on the experimental analysis of the charge transport through single-molecule junctions of the open and closed isomers of photoswitching molecules. Sulfur-free diarylethene molecules are developed and studied via electrical and optical measurements as well as density functional theory calculations. The single-molecule conductance and the current-voltage characteristics are measured in a mechanically controlled break-junction system at low temperatures. Comparing the results with the single-level transport model, we find an unexpected behavior of the current-dominating molecular orbital upon isomerization. We show that both the side chains and end groups of the molecules are crucial to understand the charge transport mechanism of photoswitching molecular junctions.

Details

OriginalspracheEnglisch
Seiten (von - bis)3736-3742
Seitenumfang7
FachzeitschriftNano letters
Jahrgang12
Ausgabenummer7
PublikationsstatusVeröffentlicht - 11 Juli 2012
Peer-Review-StatusJa
Extern publiziertJa

Schlagworte

Schlagwörter

  • charge transport, diarylethene, low temperature, Photochromic, single molecule, single-level model