Issue 1, 2011

Ultra-narrow WS2nanoribbons encapsulated in carbon nanotubes

Abstract

Layered tungsten disulfide nanostructures are of both fundamental and technological interest. The widths of currently synthesized WS2 ribbons are in the microscale. By using single-walled carbon nanotubes and double-walled carbon nanotubes as templates, we fabricate WS2 nanoribbons with smooth zigzag edges and uniform widths down to 1–3 nm and layer numbers down to 1–3, dependent on the nanotube diameter. Although bulk WS2 is a nonmagnetic semiconductor, the ultra-narrow free-standing zigzag-edged WS2 nanoribbons turn out to be magnetic or nonmagnetic metals depending on the edge passivation way according to our first-principles calculations, whereas the ultra-narrow armchair-edged WS2 nanoribbons remain nonmagnetic semiconductors with a narrow gap.

Graphical abstract: Ultra-narrow WS2 nanoribbons encapsulated in carbon nanotubes

Supplementary files

Article information

Article type
Paper
Submitted
26 Aug 2010
Accepted
17 Sep 2010
First published
20 Oct 2010

J. Mater. Chem., 2011,21, 171-180

Ultra-narrow WS2 nanoribbons encapsulated in carbon nanotubes

Z. Wang, K. Zhao, H. Li, Z. Liu, Z. Shi, J. Lu, K. Suenaga, S. Joung, T. Okazaki, Z. Jin, Z. Gu, Z. Gao and S. Iijima, J. Mater. Chem., 2011, 21, 171 DOI: 10.1039/C0JM02821E

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