Spectroscopic study for the role of polymer binding agent in the quasi-harmonic field emission behavior of polymer graphite field emission cathodes

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dc.contributor.authorAllaham, Mohammad Mahmoudcs
dc.contributor.authorDaradkeh, Samer Issa Abdel Razzaqcs
dc.contributor.authorKošelová, Zuzanacs
dc.contributor.authorDallaev, Rashidcs
dc.contributor.authorSobola, Dinaracs
dc.contributor.authorKnápek, Alexandrcs
dc.coverage.issue3cs
dc.coverage.volume100cs
dc.date.accessioned2025-04-04T11:56:27Z
dc.date.available2025-04-04T11:56:27Z
dc.date.issued2025-02-17cs
dc.description.abstractGraphite-based microcathodes have shown significant performance when operated as cold field emission electron sources. Specifically mentioned, cathodes that have been prepared from highly ordered pyrolytic graphite and polymer graphite pencil leads. Such cathodes are characterized by low operating voltages, a long lifetime, a cheap fabrication price, and a stable emission current. Recently, it was shown that polymer graphite cold field emission cathodes have a unique quasi-harmonic field emission behavior, where the process included emission of pulses of electrons with relatively higher emission current values. However, this behavior has not been reported for other graphite-based materials. In this paper, we study the effects of the polymer binding agent on the charge carriers' flow through the surface of polymer graphite using Raman-current spectroscopy. The results from polymer graphite were then compared to cathodes prepared from colloidal graphite conductive paint when deposited on a glass substrate. The results showed that the I(D)/I(G) ratio of polymer graphite had a fluctuating behavior, which was not the case for colloidal graphite, which had a more stable structure.en
dc.formattextcs
dc.format.extent1-10cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationPhysica Scripta. 2025, vol. 100, issue 3, p. 1-10.en
dc.identifier.doi10.1088/1402-4896/adb704cs
dc.identifier.issn0031-8949cs
dc.identifier.orcid0000-0002-4931-0419cs
dc.identifier.orcid0000-0002-1084-9935cs
dc.identifier.orcid0000-0002-6823-5725cs
dc.identifier.orcid0000-0002-0008-5265cs
dc.identifier.orcid0000-0003-0752-8214cs
dc.identifier.other197494cs
dc.identifier.researcheridABE-7009-2021cs
dc.identifier.researcheridAAE-8648-2020cs
dc.identifier.researcheridG-1175-2019cs
dc.identifier.researcheridE-6640-2013cs
dc.identifier.scopus57216492743cs
dc.identifier.scopus57201461813cs
dc.identifier.scopus57189064262cs
dc.identifier.scopus36544102200cs
dc.identifier.urihttps://hdl.handle.net/11012/250741
dc.language.isoencs
dc.publisherIOP Publishing Ltdcs
dc.relation.ispartofPhysica Scriptacs
dc.relation.urihttps://doi.org/10.1088/1402-4896/adb704cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0031-8949/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectpolymer graphiteen
dc.subjectcolloidal graphiteen
dc.subjectcurrent-Raman spectroscopyen
dc.subjectquasi-harmonic field emissionen
dc.subjectRaman spectroscopyen
dc.titleSpectroscopic study for the role of polymer binding agent in the quasi-harmonic field emission behavior of polymer graphite field emission cathodesen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-197494en
sync.item.dbtypeVAVen
sync.item.insts2025.04.04 13:56:27en
sync.item.modts2025.04.03 13:32:15en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav fyzikycs
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav mikroelektronikycs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé keramické materiálycs
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