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Adv Mater. 2018 Jul;30(30):e1707260. doi: 10.1002/adma.201707260. Epub 2018 Jun 7.

Single-Crystalline Nanobelts Composed of Transition Metal Ditellurides.

Author information

1
School of Materials Science and Engineering & Low-Dimensional Carbon Material Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
2
Department of Physics, Sogang University, Seoul, 04107, Republic of Korea.
3
Department of Materials Science and Engineering & Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea.
4
School of Mechanical, Aerospace, and Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
5
School of Materials Science and Engineering, University of Ulsan, Ulsan, 44610, Republic of Korea.
6
Department of Materials Science and Engineering, Yonsei University, Seoul, 03772, Republic of Korea.
7
Global Nanotechnology Development Team, National NanoFab Center, Daejeon, 34141, Republic of Korea.
8
Gumi Electronics & Information Technology Research Institute, Gumi, 39171, Republic of Korea.
9
Department of Physics & Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98105, USA.

Abstract

Following the celebrated discovery of graphene, considerable attention has been directed toward the rich spectrum of properties offered by van der Waals crystals. However, studies have been largely limited to their 2D properties due to lack of 1D structures. Here, the growth of high-yield, single-crystalline 1D nanobelts composed of transition metal ditellurides at low temperatures (T ≤ 500 °C) and in short reaction times (t ≤ 10 min) via the use of tellurium-rich eutectic metal alloys is reported. The synthesized semimetallic 1D products are highly pure, stoichiometric, structurally uniform, and free of defects, resulting in high electrical performances. Furthermore, complete compositional tuning of the ternary ditelluride nanobelts is achieved with suppressed phase separation, applicable to the creation of unprecedented low-dimensional materials/devices. This approach may inspire new growth/fabrication strategies of 1D layered nanostructures, which may offer unique properties that are not available in other materials.

KEYWORDS:

1D nanobelts; eutectic metal alloy; single-crystalline transition metal ditellurides; ternary compositional tuning

PMID:
29882243
DOI:
10.1002/adma.201707260

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