2011/09/29 by Mickael L. Perrin, Christian A. Martin, Perrin, Mickael L. +17
Engineering · Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #FOS: Physical sciences #Force Microscopy Techniques and Applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Molecular Junctions and Nanostructures #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1109.6434
10 pages, 3 figures
arxiv created 2011/09/29 · openalex publication_date 2011/09/29 · arxiv updated 2011/09/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have investigated charge transport in ZnTPPdT-Pyr molecular junctions using the lithographic MCBJ technique at room temperature and cryogenic temperature (6K). We combined low-bias statistical measurements with spectroscopy of the molecular levels using I(V) characteristics. This combination allows us to characterize the transport in a molecular junction in detail. This complex molecule can form different junction configurations, which is observed in trace histograms and in current-voltage (I(V)) measurements. Both methods show that multiple stable single-molecule junction configurations can be obtained by modulating the inter-electrode distance. In addition we demonstrate that different ZnTPPdT-Pyr junction configurations can lead to completely different spectroscopic features with the same conductance values. We show that statistical low-bias conductance measurements should be interpreted with care, and that the combination with I(V) spectroscopy represents an essential tool for a more detailed characterization of the charge transport in a single molecule.