Shalaka A. Kamble, Soumen Karmakar, Somnath R. Bhopale, Sanket D. Jangale, Neha P. Gadke, Srikumar Ghorui, S. V. Bhoraskar, M. A. More, V. L. Mathe
{"title":"LaB6 aided spontaneous conversion of bulk graphite into carbon nanotubes at normal atmospheric conditions","authors":"Shalaka A. Kamble, Soumen Karmakar, Somnath R. Bhopale, Sanket D. Jangale, Neha P. Gadke, Srikumar Ghorui, S. V. Bhoraskar, M. A. More, V. L. Mathe","doi":"arxiv-2409.06410","DOIUrl":null,"url":null,"abstract":"Herein, we report a case study in which we saw the spontaneous conversion of\ncommercial bulk graphite into LaB6 decorated carbon nanotubes (CNTs) under\nnormal atmospheric conditions. The feedstock graphite was used as a hollow\ncylindrical anode filled with LaB6 powder and partially eroded in a DC\nelectric-arc plasma reactor in pure nitrogen atmosphere. An unusual and\nspontaneous deformation of the plasma-treated residual anode into a fluffy\npowder was seen to continue for months when left to ambient atmospheric\nconditions. The existence of LaB6 decorated multi-walled CNTs at large quantity\nwas confirmed in the as-generated powder by using electron microscopy, Raman\nspectroscopy and x-ray diffraction. The as-synthesized CNT-based large-area\nfield emitter showed promising field-emitting properties with a low turn-on\nelectric field of ~1.5 V per micrometer, and a current density of ~1.17 mA per\nsquare cm at an applied electric field of 3.24 V per micrometer.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Applied Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.06410","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
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.
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