Title: Effect of Metal Ions on Hybrid Graphite-Diamond Nanowire Growth: Conductivity Measurements from a Single Nanowire Device
Authors: Shellaiah, Muthaiah
Chen, Ying-Chou
Simon, Turibius
Li, Liang-Chen
Sun, Kien Wen
Ko, Fu-Hsiang
材料科學與工程學系
應用化學系
電子工程學系及電子研究所
奈米科技中心
Department of Materials Science and Engineering
Department of Applied Chemistry
Department of Electronics Engineering and Institute of Electronics
Center for Nanoscience and Technology
Keywords: nanodiamond;nanoparticles;metal ions induced graphitization;supramolecular assembly;graphite-diamond nanowires;carrier transport;carbon nanomaterials;conductivity;semiconductors
Issue Date: 11-Mar-2019
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 sp(2) graphite layer and sp(3) 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 x 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.
URI: http://dx.doi.org/10.3390/nano9030415
http://hdl.handle.net/11536/151586
ISSN: 2079-4991
DOI: 10.3390/nano9030415
Journal: NANOMATERIALS
Volume: 9
Issue: 3
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End Page: 0
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