LaB6 aided spontaneous conversion of bulk graphite into carbon nanotubes at normal atmospheric conditions
| Autor: | Kamble, Shalaka A., Karmakar, Soumen, Bhopale, Somnath R., Jangale, Sanket D., Gadke, Neha P., Ghorui, Srikumar, Bhoraskar, S. V., More, M. A., Mathe, V. L. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Herein, we report a case study in which we saw the spontaneous conversion of commercial bulk graphite into LaB6 decorated carbon nanotubes (CNTs) under normal atmospheric conditions. The feedstock graphite was used as a hollow cylindrical anode filled with LaB6 powder and partially eroded in a DC electric-arc plasma reactor in pure nitrogen atmosphere. An unusual and spontaneous deformation of the plasma-treated residual anode into a fluffy powder was seen to continue for months when left to ambient atmospheric conditions. The existence of LaB6 decorated multi-walled CNTs at large quantity was confirmed in the as-generated powder by using electron microscopy, Raman spectroscopy and x-ray diffraction. The as-synthesized CNT-based large-area field emitter showed promising field-emitting properties with a low turn-on electric field of ~1.5 V per micrometer, and a current density of ~1.17 mA per square cm at an applied electric field of 3.24 V per micrometer. Comment: 6 pages, 5figures |
| Databáze: | arXiv |
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