Field Emission Properties of Polymer Graphite Tips Prepared by Membrane Electrochemical Etching
| Autor: | Rashid Dallaev, Dinara Sobola, Milan Matějka, Marwan S. Mousa, Miroslav Horáček, Alexandr Knápek, Pavel Kaspar, Mohammad M. Allaham, Daniel Burda |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
polymer graphite tip Scanning electron microscope General Chemical Engineering field emission microscopy electrochemical etching Article Anode Field emission microscopy lcsh:Chemistry Field electron emission symbols.namesake lcsh:QD1-999 Etching (microfabrication) Electrode symbols General Materials Science Graphite Composite material Raman spectroscopy |
| Zdroj: | Nanomaterials Volume 10 Issue 7 Nanomaterials. 2020, vol. 10, issue 7, p. 1-12. Nanomaterials, Vol 10, Iss 1294, p 1294 (2020) |
| ISSN: | 2079-4991 |
| DOI: | 10.3390/nano10071294 |
| Popis: | 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&ndash 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&ndash voltage characteristics that are the input to test field emission orthodoxy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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