We have developed a chemical method to intercalate a variety of zerovalent metal atoms into two-dimensional (2D) layered Bi(2)Se(3) chalcogenide nanoribbons. We use a chemical reaction, such as a disproportionation redox reaction, to generate dilute zerovalent metal atoms in a refluxing solution, which intercalate into the layered Bi(2)Se(3) structure. The zerovalent nature of the intercalant allows superstoichiometric intercalation of metal atoms such as Ag, Au, Co, Cu, Fe, In, Ni, and Sn. We foresee the impact of this methodology in establishing novel fundamental physical behaviors and in possible energy applications.
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http://dx.doi.org/10.1021/ja304925t | DOI Listing |
Nat Mater
January 2025
Department of Physics, Harvard University, Cambridge, MA, USA.
Atomically thin van der Waals (vdW) films provide a material platform for the epitaxial growth of quantum heterostructures. However, unlike the remote epitaxial growth of three-dimensional bulk crystals, the growth of two-dimensional material heterostructures across atomic layers has been limited due to the weak vdW interaction. Here we report the double-sided epitaxy of vdW layered materials through atomic membranes.
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January 2025
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, Hubei, P. R. China.
Pd cocatalysts show great potential for the photocatalytic production of HO. However, the catalytic efficiency of Pd cocatalyst is limited due to the strong adsorption of O, which promotes O-O bond cleavage and thus reduces selectivity for the two-electron O reduction reaction. Considering that adjusting the electron density of Pd can predominately optimize Pd-Oads bond strength, in this work, electron-rich Pd sites are constructed by introducing BiSe middle layer between Pd cocatalysts and (010) facet of BiVO using an in-situ selenization strategy.
View Article and Find Full Text PDFSci Rep
December 2024
Department of Materials, Imperial College London, London, SW7 2AZ, UK.
Topological Insulators (TIs) are promising platforms for Quantum Technology due to their topologically protected surface states (TSS). Plasmonic excitations in TIs are especially interesting both as a method of characterisation for TI heterostructures, and as potential routes to couple optical and spin signals in low-loss devices. Since the electrical properties of the TI surface are critical, tuning TI surfaces is a vital step in developing TI structures that can be applied in real world plasmonic devices.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Catalonia Institute for Energy Research-IREC, Sant Adrià de Besòs, Barcelona, 08930, Spain.
Lithium-sulfur batteries (LSBs) are among the most promising next-generation energy storage technologies. However, a slow Li-S reaction kinetics at the LSB cathode limit their energy and power densities. To address these challenges, this study introduces an anionic-doped transition metal chalcogenide as an effective catalyst to accelerate the Li-S reaction.
View Article and Find Full Text PDFMaterials (Basel)
November 2024
Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin 300354, China.
Understanding the physical and chemical processes at the interfaces of metals and topological insulators is crucial for the development of the next generation of topological quantum devices. Here, we report the discovery of robust superconductivity in Pd/BiSe bilayers fabricated by sputtering Pd on the surface of BiSe. Through transmission electron microscopy measurements, we identify that the observed interfacial superconductivity originates from the diffusion of Pd into BiSe.
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