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Homogeneous Dispersion of Carbon Nanotubes on Surface-Modified Bulk Titanium Substrates by Thermal Chemical Vapor Deposition

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Catalytic syntheses of CNTs on the pristine Ti mesh, the pristine Ti plate and the etched Ti plate have been conducted using thermal chemical vapor deposition (CVD) with Fe catalysts. Surface of the pristine Ti plate was etched in a sulfuric acid (H2SO4) solution to facilitate the uniform dispersion of Fe catalysts. The surface of Ti substrates, the distribution and the composition of catalysts, and the structure and dispersion of the CNTs were examined using Scanning electron microscope (SEM), transmission electron microscope (TEM), atomic force microscope (AFM), electron probe micro-analysis (EPMA) and Micro-Raman spectroscopy. Fe catalysts were dispersed uniformly on the surface of the etched Ti plate indicating that Surface modification by etching was effective. CNTs on the pristine Ti mesh and the etched Ti plate are more densely populated and have smaller diameters than CNTs on the pristine Ti plate. These results can be attributed to smaller Fe catalysts more homogeneously distributed on the pristine Ti mesh and the etched Ti plate. The calculated I G/I D ratios of 1.02 and 0.97 for CNTs on the pristine Ti mesh and the etched Ti plate, respectively, indicate a high degree of structural disorders on CNTs.
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Document Type: Research Article

Publication date: January 1, 2016

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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