Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 92: Transport – Poster
TT 92.9: Poster
Thursday, March 12, 2026, 18:00–20:00, P4
STM-Break Junction Measurements of Organic Dyes — •Yannic Altmann1,2, René Matzdorf1, and Rüdiger Faust2 — 1Institute of Physics, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany — 2Institute of Chemistry, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
Current research in molecular electronics explores multiple ways to manipulate the conductivity of molecules inside of single-molecule junctions using external stimuli. Examples are magnetic fields [1], external forces [2], as well as electromagnetic radiation [3].
We use a LT-STM to measure the conductance of single oligo(phenylene ethynylene) molecules in STM break junction inspired experiments in two different ways: I(z)-spectroscopy as well as I(t)-spectroscopy. The goal of the project is to do similar measurements on organic dye molecules to study the effects of molecule excitation with visible light on the molecular conductance.
[1] G. Mitra et al., Nano Letters 22, 5773 (2022)
[2] P. Zhou, et al., Jo. American Chem. Soc. 145, 18800 (2023)
[3] E-D. Fung et al., Nano Letters 17, 1255 (2017)
Keywords: break junction; molecular dyes; scanning tunneling microscopy; charge transport