Defect-Free Nanowelding of Bilayer SnSe Nanoplates.

Autor: Ji JR; Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle, Germany., Villanova JW; Department of Physics, University of Arkansas, Fayetteville, AR, 72701, USA., Barraza-Lopez S; Department of Physics, University of Arkansas, Fayetteville, AR, 72701, USA., Parkin SSP; Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle, Germany., Chang K; Beijing Academy of Quantum Information Sciences, Beijing, 100193, China.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Sep; Vol. 36 (36), pp. e2312199. Date of Electronic Publication: 2024 Jul 08.
DOI: 10.1002/adma.202312199
Abstrakt: Nanowelding is a bottom-up technique to create custom-designed nanostructures and devices beyond the precision of lithographic methods. Here, a new technique is reported based on anisotropic lubricity at the van der Waals interface between monolayer and bilayer SnSe nanoplates and a graphene substrate to achieve precise control of the crystal orientation and the interface during the welding process. As-grown SnSe monolayer and bilayer nanoplates are commensurate with graphene's armchair direction but lack commensuration along graphene's zigzag direction, resulting in a reduced friction along that direction and a rail-like, 1D movement that permits joining nanoplates with high precision. This way, molecular beam epitaxially grown SnSe nanoplates of lateral sizes 30-100 nm are manipulated by the tip of a scanning tunneling microscope at room temperature. In situ annealing is applied afterward to weld contacting nanoplates without atomic defects at the interface. This technique can be generalized to any van der Waals interfaces with anisotropic lubricity and is highly promising for the construction of complex quantum devices, such as field effect transistors, quantum interference devices, lateral tunneling junctions, and solid-state qubits.
(© 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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