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Title: Torsional instability in the single-chain limit of a transition metal trichalcogenide

Abstract

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 NbSe 3 (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 NbSe 3 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.

Authors:
; ; ORCiD logo; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1460921
Alternate Identifier(s):
OSTI ID: 1530369
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Name: Science Journal Volume: 361 Journal Issue: 6399; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Pham, Thang, Oh, Sehoon, Stetz, Patrick, Onishi, Seita, Kisielowski, Christian, Cohen, Marvin L., and Zettl, Alex. Torsional instability in the single-chain limit of a transition metal trichalcogenide. United States: N. p., 2018. Web. doi:10.1126/science.aat4749.
Pham, Thang, Oh, Sehoon, Stetz, Patrick, Onishi, Seita, Kisielowski, Christian, Cohen, Marvin L., & Zettl, Alex. Torsional instability in the single-chain limit of a transition metal trichalcogenide. United States. doi:10.1126/science.aat4749.
Pham, Thang, Oh, Sehoon, Stetz, Patrick, Onishi, Seita, Kisielowski, Christian, Cohen, Marvin L., and Zettl, Alex. Thu . "Torsional instability in the single-chain limit of a transition metal trichalcogenide". United States. doi:10.1126/science.aat4749.
@article{osti_1460921,
title = {Torsional instability in the single-chain limit of a transition metal trichalcogenide},
author = {Pham, Thang and Oh, Sehoon and Stetz, Patrick and Onishi, Seita and Kisielowski, Christian and Cohen, Marvin L. and Zettl, Alex},
abstractNote = {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 NbSe 3 (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 NbSe 3 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.},
doi = {10.1126/science.aat4749},
journal = {Science},
number = 6399,
volume = 361,
place = {United States},
year = {2018},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/science.aat4749

Citation Metrics:
Cited by: 1 work
Citation information provided by
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