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Field Emission Properties of Polymer Graphite Tips Prepared by Membrane Electrochemical Etching

This paper investigates field emission behavior from the surface of a tip that was prepared from polymer graphite nanocomposites subjected to electrochemical etching. The essence of the tip preparation is to create a membrane of etchant over an electrode metal ring. The graphite rod acts here as an...

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Autores principales: Knápek, Alexandr, Dallaev, Rashid, Burda, Daniel, Sobola, Dinara, Allaham, Mohammad M., Horáček, Miroslav, Kaspar, Pavel, Matějka, Milan, Mousa, Marwan S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7407335/
https://www.ncbi.nlm.nih.gov/pubmed/32630184
http://dx.doi.org/10.3390/nano10071294
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author Knápek, Alexandr
Dallaev, Rashid
Burda, Daniel
Sobola, Dinara
Allaham, Mohammad M.
Horáček, Miroslav
Kaspar, Pavel
Matějka, Milan
Mousa, Marwan S.
author_facet Knápek, Alexandr
Dallaev, Rashid
Burda, Daniel
Sobola, Dinara
Allaham, Mohammad M.
Horáček, Miroslav
Kaspar, Pavel
Matějka, Milan
Mousa, Marwan S.
author_sort Knápek, Alexandr
collection PubMed
description This paper investigates field emission behavior from the surface of a tip that was prepared from polymer graphite nanocomposites subjected to electrochemical etching. The essence of the tip preparation is to create a membrane of etchant over an electrode metal ring. The graphite rod acts here as an anode and immerses into the membrane filled with alkali etchant. After the etching process, the tip is cleaned and analyzed by Raman spectroscopy, investigating the chemical composition of the tip. The topography information is obtained using the Scanning Electron Microscopy and by Field Emission Microscopy. The evaluation and characterization of field emission behavior is performed at ultra-high vacuum conditions using the Field Emission Microscopy where both the field electron emission pattern projected on the screen and current–voltage characteristics are recorded. The latter is an essential tool that is used both for the imaging of the tip surfaces by electrons that are emitted toward the screen, as well as a tool for measuring current–voltage characteristics that are the input to test field emission orthodoxy.
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spelling pubmed-74073352020-08-11 Field Emission Properties of Polymer Graphite Tips Prepared by Membrane Electrochemical Etching Knápek, Alexandr Dallaev, Rashid Burda, Daniel Sobola, Dinara Allaham, Mohammad M. Horáček, Miroslav Kaspar, Pavel Matějka, Milan Mousa, Marwan S. Nanomaterials (Basel) Article This paper investigates field emission behavior from the surface of a tip that was prepared from polymer graphite nanocomposites subjected to electrochemical etching. The essence of the tip preparation is to create a membrane of etchant over an electrode metal ring. The graphite rod acts here as an anode and immerses into the membrane filled with alkali etchant. After the etching process, the tip is cleaned and analyzed by Raman spectroscopy, investigating the chemical composition of the tip. The topography information is obtained using the Scanning Electron Microscopy and by Field Emission Microscopy. The evaluation and characterization of field emission behavior is performed at ultra-high vacuum conditions using the Field Emission Microscopy where both the field electron emission pattern projected on the screen and current–voltage characteristics are recorded. The latter is an essential tool that is used both for the imaging of the tip surfaces by electrons that are emitted toward the screen, as well as a tool for measuring current–voltage characteristics that are the input to test field emission orthodoxy. MDPI 2020-07-01 /pmc/articles/PMC7407335/ /pubmed/32630184 http://dx.doi.org/10.3390/nano10071294 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Knápek, Alexandr
Dallaev, Rashid
Burda, Daniel
Sobola, Dinara
Allaham, Mohammad M.
Horáček, Miroslav
Kaspar, Pavel
Matějka, Milan
Mousa, Marwan S.
Field Emission Properties of Polymer Graphite Tips Prepared by Membrane Electrochemical Etching
title Field Emission Properties of Polymer Graphite Tips Prepared by Membrane Electrochemical Etching
title_full Field Emission Properties of Polymer Graphite Tips Prepared by Membrane Electrochemical Etching
title_fullStr Field Emission Properties of Polymer Graphite Tips Prepared by Membrane Electrochemical Etching
title_full_unstemmed Field Emission Properties of Polymer Graphite Tips Prepared by Membrane Electrochemical Etching
title_short Field Emission Properties of Polymer Graphite Tips Prepared by Membrane Electrochemical Etching
title_sort field emission properties of polymer graphite tips prepared by membrane electrochemical etching
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7407335/
https://www.ncbi.nlm.nih.gov/pubmed/32630184
http://dx.doi.org/10.3390/nano10071294
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