Spontaneous growth and phase transformation of highly conductive nickel germanide nanowires

We report the synthesis, phase transformation, and electrical property measurement of single-crystal NiGe and ε-Ni5Ge3 nanowires (NWs). NiGe NWs were spontaneously synthesized by chemical vapor deposition of GeH4 onto a porous Ni substrate without the use of intentional catalysts. The as-grown NWs o...

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Main Authors: Higgins, Jeremy M., Faber, Matthew S., Yan, Chaoyi, Lee, Pooi See, Jin, Song
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/97270
http://hdl.handle.net/10220/10448
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-972702020-06-01T10:26:30Z Spontaneous growth and phase transformation of highly conductive nickel germanide nanowires Higgins, Jeremy M. Faber, Matthew S. Yan, Chaoyi Lee, Pooi See Jin, Song School of Materials Science & Engineering We report the synthesis, phase transformation, and electrical property measurement of single-crystal NiGe and ε-Ni5Ge3 nanowires (NWs). NiGe NWs were spontaneously synthesized by chemical vapor deposition of GeH4 onto a porous Ni substrate without the use of intentional catalysts. The as-grown NWs of the orthorhombic NiGe phase were transformed to the hexagonal ε-Ni5Ge3 phase by thermal annealing induced Ni enrichment. This controllable conversion of germanide phases is desirable for phase-dependent property study and applications, and the observation of novel metastable ε-Ni5Ge3 phase suggests the importance of kinetic factors in such nanophase transformations. Electrical studies reveal that NiGe NWs are highly conductive, with an average resistivity of 35 ± 15 μΩ·cm, while the resistivity of ε-Ni5Ge3 NWs is more than 4 times that of the NiGe phase. NWs of nickel germanides, particularly NiGe, would be useful building blocks for germanium-based nanoelectronic devices. 2013-06-17T06:36:52Z 2019-12-06T19:40:45Z 2013-06-17T06:36:52Z 2019-12-06T19:40:45Z 2011 2011 Journal Article Yan, C., Higgins, J. M., Faber, M. S., Lee, P. S., & Jin, S. (2011). Spontaneous Growth and Phase Transformation of Highly Conductive Nickel Germanide Nanowires. ACS Nano, 5(6), 5006-5014. 1936-0851 https://hdl.handle.net/10356/97270 http://hdl.handle.net/10220/10448 10.1021/nn201108u en ACS nano © 2011 American Chemical Society.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description We report the synthesis, phase transformation, and electrical property measurement of single-crystal NiGe and ε-Ni5Ge3 nanowires (NWs). NiGe NWs were spontaneously synthesized by chemical vapor deposition of GeH4 onto a porous Ni substrate without the use of intentional catalysts. The as-grown NWs of the orthorhombic NiGe phase were transformed to the hexagonal ε-Ni5Ge3 phase by thermal annealing induced Ni enrichment. This controllable conversion of germanide phases is desirable for phase-dependent property study and applications, and the observation of novel metastable ε-Ni5Ge3 phase suggests the importance of kinetic factors in such nanophase transformations. Electrical studies reveal that NiGe NWs are highly conductive, with an average resistivity of 35 ± 15 μΩ·cm, while the resistivity of ε-Ni5Ge3 NWs is more than 4 times that of the NiGe phase. NWs of nickel germanides, particularly NiGe, would be useful building blocks for germanium-based nanoelectronic devices.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Higgins, Jeremy M.
Faber, Matthew S.
Yan, Chaoyi
Lee, Pooi See
Jin, Song
format Article
author Higgins, Jeremy M.
Faber, Matthew S.
Yan, Chaoyi
Lee, Pooi See
Jin, Song
spellingShingle Higgins, Jeremy M.
Faber, Matthew S.
Yan, Chaoyi
Lee, Pooi See
Jin, Song
Spontaneous growth and phase transformation of highly conductive nickel germanide nanowires
author_sort Higgins, Jeremy M.
title Spontaneous growth and phase transformation of highly conductive nickel germanide nanowires
title_short Spontaneous growth and phase transformation of highly conductive nickel germanide nanowires
title_full Spontaneous growth and phase transformation of highly conductive nickel germanide nanowires
title_fullStr Spontaneous growth and phase transformation of highly conductive nickel germanide nanowires
title_full_unstemmed Spontaneous growth and phase transformation of highly conductive nickel germanide nanowires
title_sort spontaneous growth and phase transformation of highly conductive nickel germanide nanowires
publishDate 2013
url https://hdl.handle.net/10356/97270
http://hdl.handle.net/10220/10448
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