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Meeting Materials Science & Technology 2020
Symposium Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
Presentation Title Purification of Carbon Nanotube Yarns via Incandescent Annealing
Author(s) Pouria Khanbolouki, Mehran Tehrani
On-Site Speaker (Planned) Pouria Khanbolouki
Abstract Scope This study presents a systematic investigation of carbon nanotube (CNT) yarn purification from its catalytic constituents and byproducts via an incandescent current induced annealing process in high vacuum. It is concluded that incandescent annealing can provide a low-energy alternative for purification of CNT structures from their catalytic constituents in a matter of seconds compared to thermal annealing at high temperatures, which takes hours. The difference is due to different impurity removal mechanisms involved in the two processes. The structural and morphological changes within the CNT yarns were investigated via scanning/transmission electron microscopy, energy dispersive spectroscopy, Raman spectroscopy, and thermogravimetric analysis. The morphological changes are correlated with the electrical property evolution of the CNT yarns. The impurity removal mechanisms, CNT doping mechanisms, and pros and cons of the current characterization methods for bulk CNT structures are discussed.

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Direct Synthesis of Nanoclusters from Cu Nanowires
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Oxide Nucleation and Growth during In Situ Oxidation of Cu and Cu Alloys
Panchromatic Light Absorption in CdSe/CdS Coated SnO2 Nanowires for Solar-fuel Conversion
Purification of Carbon Nanotube Yarns via Incandescent Annealing
Rheological Dynamics of Liquid Crystal-coupled Nanocomposites under Influence of Thermal Gradients
The Formation Mechanism of TiO2 Polymorphs under Hydrothermal Conditions
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