期刊
SCIENCE
卷 361, 期 6399, 页码 263-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aat4749
关键词
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资金
- U.S. Department of Energy (DOE) Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division within the sp2-Bonded Materials Program [DE-AC02-05-CH11231, KC2207]
- DOE Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division within the van der Waals Heterostructures Program [DE-AC02-05-CH11231, KCWF16]
- DOE Office of Science, Office of Basic Energy Sciences [DE-AC02-05-CH11231]
- NSF [DMR-1206512, DMR 1508412]
- Direct For Mathematical & Physical Scien [1206512] Funding Source: National Science Foundation
- Division Of Materials Research [1206512] Funding Source: National Science Foundation
The scientific bounty resulting from the successful isolation of few to single layers of two-dimensional materials suggests that related new physics resides in the few-to single-chain limit of one-dimensional materials. We report the synthesis of the quasi-one-dimensional transition metal trichalcogenide NbSe3 (niobium triselenide) in the few-chain limit, including the realization of isolated single chains. The chains are encapsulated in protective boron nitride or carbon nanotube sheaths to prevent oxidation and to facilitate characterization. Transmission electron microscopy reveals static and dynamic structural torsional waves not found in bulk NbSe3 crystals. Electronic structure calculations indicate that charge transfer drives the torsional wave instability. Very little covalent bonding is found between the chains and the nanotube sheath, leading to relatively unhindered longitudinal and torsional dynamics for the encapsulated chains.
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