Energy Dissipation from Confined States in Nanoporous Molecular Networks

D`Astolfo, Philipp and Wang, Xing and Liu, Xunshan and Kisiel, Marcin and Drechsel, Carl and Baratoff, Alexis and Aschauer, Ulrich and Decurtins, Silvio and Liu, Shi-Xia and Pawlak, Rémy and Meyer, Ernst. (2022) Energy Dissipation from Confined States in Nanoporous Molecular Networks. ACS Nano, 16 (10). pp. 16314-16321.

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Official URL: https://edoc.unibas.ch/93317/

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rystalline nanoporous molecular networks are assembled on the Ag(111) surface, where the pores confine electrons originating from the surface state of the metal. Depending on the pore sizes and their coupling, an antibonding level is shifted upward by 0.1–0.3 eV as measured by scanning tunneling microscopy. On molecular sites, a downshifted bonding state is observed, which is occupied under equilibrium conditions. Low-temperature force spectroscopy reveals energy dissipation peaks and jumps of frequency shifts at bias voltages, which are related to the confined states. The dissipation maps show delocalization on the supramolecular assembly and a weak distance dependence of the dissipation peaks. These observations indicate that two-dimensional arrays of coupled quantum dots are formed, which are quantitatively characterized by their quantum capacitances and resonant tunneling rates. Our work provides a method for studying the capacitive and dissipative response of quantum materials with nanomechanical oscillators.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Meyer, Ernst and Kisiel, Marcin and Baratoff, Alexis and Drechsel, Carl and D'Astolfo, Philipp and Pawlak, Rémy
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:24 May 2023 07:08
Deposited On:08 Mar 2023 08:14

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