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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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. |
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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. |
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School of Materials Science & Engineering |
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School of Materials Science & Engineering Higgins, Jeremy M. Faber, Matthew S. Yan, Chaoyi Lee, Pooi See Jin, Song |
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Higgins, Jeremy M. Faber, Matthew S. Yan, Chaoyi Lee, Pooi See Jin, Song |
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Higgins, Jeremy M. Faber, Matthew S. Yan, Chaoyi Lee, Pooi See Jin, Song Spontaneous growth and phase transformation of highly conductive nickel germanide nanowires |
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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 |
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2013 |
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https://hdl.handle.net/10356/97270 http://hdl.handle.net/10220/10448 |
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