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http://dx.doi.org/10.5757/JKVS.2011.20.1.070

Field Emission Characteristics of Double-walled Carbon Nanotubes Related with Hydrochloric Acid Treatment  

Jung, Da-Mi (Department of Nano science & technology, University of Seoul)
Sok, Jung-Hyun (Department of Nano science & technology, University of Seoul)
Publication Information
Journal of the Korean Vacuum Society / v.20, no.1, 2011 , pp. 70-76 More about this Journal
Abstract
High-quality double-walled carbon nanotubes (DWCNTs) were synthesized by catalytic decomposition method at $800^{\circ}C$ using Tetrahydrofuran. The as-synthesized DWCNTs typically have catalytic impurities and amorphous carbon, which were removed by two-step purification process, consisting of thermal oxidation and H2O2, HNO3, HCl treatment. The DWCNT suspension was prepared by dispersing the purified DWCNTs in an aqueous sodium dodecylbenzenesulfonate solution with horn-type sonication. This was then sprayed on ITO glass to fabricate CNT field emitters. The quality of purified DWCNTs was estimated with X-ray diffraction and Thermal Gravity Analysis. The field emission properties were improved by increasing the process time of HCl treatment.
Keywords
Carbon nanotube; Tetrahydrofuran; Purification; Field emission;
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Times Cited By KSCI : 2  (Citation Analysis)
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