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Synthesis, electrical and magnetic characterization of core-shell silicon carbo-nitride coated carbon nanotubes |
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| Authors: | Gurpreet Singh Shashank Priya Maria R. Hossu Sachit Grover Roop L. Mahajan |
| Affiliation: | a Institute for Critical Technology and Applied Science (ICTAS), Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA b Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA c Department of Physics, University of Texas at Arlington, TX 76019, USA d Department of Engineering Mechanics, Center for Aircraft Structural Life Extension (CAStLE) United States Air Force Academy, USAF Academy, CO 80840, USA e Department of Electrical and Computer Engineering, University of Colorado at Boulder, CO 80309, USA f Department of Mechanical Engineering, Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA |
| Abstract: | We demonstrate synthesis, electrical and magnetic characterization of silicon carbo-nitride (SiCN) coated multiwalled carbon nanotubes in a core-shell structure. The core formed by a carbon nanotube had a diameter in the range of 10-100 nm. The shell was synthesized by pyrolysis of an SiCN precursor on the surface of carbon nanotubes. Electrical resistivity of an individual composite nanotube was measured to be ~ 2.55 × 103 Ω cm. The magnetic measurements performed by a superconducting quantum interference device on the composite nanotubes in the temperature range of 5-300 K show a reduced coercive field with increasing temperatures. The monolayer thick coating of an ultra high temperature multifunctional ceramic SiCN makes these composite nanotubes very promising for sensing applications in harsh environments. |
| Keywords: | SiCN Carbon nanotubes Focused ion beam Magnetization Nanomanipulation |
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