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A multi-state supramolecular switch realized a [π⋯π] dimer.
Phys Chem Chem Phys
December 2024
College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China.
Supramolecular assemblies have attracted great attention in the latest studies of molecular electronic devices for their superiorities. Here, we design a non-covalent [π⋯π] dimer made of DCV4Ts (two-terminally dicyanovinyl-substituted quaterthiophenes), and five typical conformations of this dimer are specifically focused on. Based on density-functional theory calculations and the non-equilibrium Green's function technique, electron transport properties through the dimer are mainly investigated in molecular junctions.
View Article and Find Full Text PDFTransitions between positive and negative charge states of dangling bonds on a halogenated Si(100) surface.
Phys Chem Chem Phys
December 2024
Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia.
Dangling bonds (DBs) are common defects in silicon that affect its electronic performance by trapping carriers at the in-gap levels. For probing the electrical properties of individual DBs, a scanning tunneling microscope (STM) is an effective instrument. Here we study transitions between charge states of a single DB on chlorinated and brominated Si(100)-2 × 1 surfaces in an STM.
View Article and Find Full Text PDFObservation of Yu-Shiba-Rusinov-like states at the edge of CrBr/NbSe heterostructure.
Nat Commun
November 2024
School of Emerging Technology and Department of Physics, University of Science and Technology of China, Hefei, 230026, China.
The hybrid ferromagnet-superconductor heterostructures have attracted extensive attention as they potentially host topological superconductivity. Relevant experimental signatures have recently been reported in CrBr/NbSe ferromagnet-superconductor heterostructure, but controversies remain. Here, we reinvestigate CrBr/NbSe by an ultralow temperature scanning tunneling microscope with higher spatial and energy resolutions.
View Article and Find Full Text PDFα,ω-Alkanedibromides Form Low Conductance Chemisorbed Junctions with Silver Electrodes.
J Am Chem Soc
October 2024
Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States.
Chemical groups capable of connecting molecules physically and electrically between electrodes are of critical importance in molecular-scale electronics, influencing junction conductance, variability, and function. While the development of such linkage chemistries has focused on interactions at gold, the distinct reactivity and electronic structure of other electrode metals provides underexplored opportunities to characterize and exploit new binding motifs. In this work we show that α,ω-alkanedibromides spontaneously form well-defined junctions using silver, but not gold, electrodes through application of the glovebox-based scanning tunneling microscope-based break junction method.
View Article and Find Full Text PDFDirectional picoantenna behavior of tunnel junctions formed by an atomic-scale surface defect.
Sci Adv
September 2024
IMDEA Nanociencia, Madrid, Spain.
Plasmonic nanoantennas have attracted much attention lately, among other reasons because of the directionality of light emitted by fluorophores coupled to their localized surface plasmon resonances. Plasmonic picocavities, i.e.
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