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Nanomaterials 2019, 9(3), 415; https://doi.org/10.3390/nano9030415

Effect of Metal Ions on Hybrid Graphite-Diamond Nanowire Growth: Conductivity Measurements from a Single Nanowire Device

1
Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
2
Department of Electronics Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
3
Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
4
Center for Nano Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan
*
Author to whom correspondence should be addressed.
Received: 14 February 2019 / Revised: 4 March 2019 / Accepted: 7 March 2019 / Published: 11 March 2019
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Abstract

Novel Cd2+ ions mediated reproducible hybrid graphite-diamond nanowire (G-DNWs; Cd2+-NDS1 NW) growth from 4-Amino-5-phenyl-4H-1,2,4-triazole-3-thiol (S1) functionalized diamond nanoparticles (NDS1) via supramolecular assembly is reported and demonstrated through TEM and AFM images. FTIR, EDX and XPS studies reveal the supramolecular coordination between functional units of NDS1 and Cd2+ ions towards NWs growth. Investigations of XPS, XRD and Raman data show the covering of graphite sheath over DNWs. Moreover, HR-TEM studies on Cd2+-NDS1 NW confirm the coexistence of less perfect sp2 graphite layer and sp3 diamond carbon along with impurity channels and flatten surface morphology. Possible mechanisms behind the G-DNWs growth are proposed and clarified. Subsequently, conductivity of the as-grown G-DNWs is determined through the fabrication of a single Cd2+-NDS1 NW device, in which the G-DNW portion L2 demonstrates a better conductivity of 2.31 × 10−4 mS/cm. In addition, we investigate the temperature-dependent carrier transport mechanisms and the corresponding activation energy in details. Finally, comparisons in electrical resistivities with other carbon-based materials are made to validate the importance of our conductivity measurements. View Full-Text
Keywords: nanodiamond; nanoparticles; metal ions induced graphitization; supramolecular assembly; graphite-diamond nanowires; carrier transport; carbon nanomaterials; conductivity; semiconductors nanodiamond; nanoparticles; metal ions induced graphitization; supramolecular assembly; graphite-diamond nanowires; carrier transport; carbon nanomaterials; conductivity; semiconductors
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Shellaiah, M.; Chen, Y.-C.; Simon, T.; Li, L.-C.; Sun, K.W.; Ko, F.-H. Effect of Metal Ions on Hybrid Graphite-Diamond Nanowire Growth: Conductivity Measurements from a Single Nanowire Device. Nanomaterials 2019, 9, 415.

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