Print Email Facebook Twitter Controlling the Entropy of a Single-Molecule Junction Title Controlling the Entropy of a Single-Molecule Junction Author Pyurbeeva, Eugenia (Queen Mary University of London) Hsu, C. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Vogel, David (University of Basel) Wegeberg, Christina (University of Basel) Mayor, Marcel (University of Basel; Sun Yat-sen University) van der Zant, H.S.J. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Mol, Jan A. (Queen Mary University of London) Gehring, P. (Université Catholique de Louvain) Date 2021 Abstract Single molecules are nanoscale thermodynamic systems with few degrees of freedom. Thus, the knowledge of their entropy can reveal the presence of microscopic electron transfer dynamics that are difficult to observe otherwise. Here, we apply thermocurrent spectroscopy to directly measure the entropy of a single free radical molecule in a magnetic field. Our results allow us to uncover the presence of a singlet to triplet transition in one of the redox states of the molecule, not detected by conventional charge transport measurements. This highlights the power of thermoelectric measurements which can be used to determine the difference in configurational entropy between the redox states of a nanoscale system involved in conductance without any prior assumptions about its structure or microscopic dynamics. Subject Molecular electronicsentropymolecular thermoelectricsquantum thermodynamicsthermocurrent spectroscopy To reference this document use: http://resolver.tudelft.nl/uuid:6fa8bf6e-cd61-4024-b14c-12cf973cbc9c DOI https://doi.org/10.1021/acs.nanolett.1c03591 Embargo date 2022-05-12 ISSN 1530-6984 Source Nano Letters: a journal dedicated to nanoscience and nanotechnology, 21 (22), 9715-9719 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2021 Eugenia Pyurbeeva, C. Hsu, David Vogel, Christina Wegeberg, Marcel Mayor, H.S.J. van der Zant, Jan A. Mol, P. Gehring Files PDF acs.nanolett.1c03591.pdf 1.08 MB Close viewer /islandora/object/uuid:6fa8bf6e-cd61-4024-b14c-12cf973cbc9c/datastream/OBJ/view