Influence of Polystyrene Layer on the Field Electron Emission Performance of Nano-Apex Carbon Fibre Emitters

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F21%3APU145833" target="_blank" >RIV/00216305:26620/21:PU145833 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.tandfonline.com/doi/abs/10.1080/2374068X.2021.1938886?journalCode=tmpt20" target="_blank" >https://www.tandfonline.com/doi/abs/10.1080/2374068X.2021.1938886?journalCode=tmpt20</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/2374068X.2021.1938886" target="_blank" >10.1080/2374068X.2021.1938886</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Polystyrene Layer on the Field Electron Emission Performance of Nano-Apex Carbon Fibre Emitters

Popis výsledku v původním jazyce

A comprehensive investigation has been carried out to determine the source of an inherent temporal instability in the spatial distribution and the emission current obtained from field electron-emitting carbon fiber tips of type Polyacrylonitrile VPR – 19, thermally treated at 2800 °C. These instability effects have been successfully overcome by coating the carbon fiber tip with a sub-micron layer of polystyrene . The current-voltage characteristics, Fowler-Nordheim plots, Murphy-Good plots and the scanning electron micrographs in addition to the field electron emission patterns were used in this investigation to study the emission characteristics of carbon fiber tips before and after samples are being coated with polystyrene layer. Comparison between the emission process from the clean and composite tips are reported and the current-voltage characteristics were obtained at a threshold field that is a few times lower than that of the clean tip. At low emission current levels linear Fowler-Nordheim and Murphy-Good plots were obtained with a slope value lower than that of the clean tip. The spatial distribution consisted of a very bright spot without any internal structure. These results suggest that a polystyrene coated fiber tip offers better performance than the clean carbon fiber tip as a new field electron emission source.

Název v anglickém jazyce

Influence of Polystyrene Layer on the Field Electron Emission Performance of Nano-Apex Carbon Fibre Emitters

Popis výsledku anglicky

A comprehensive investigation has been carried out to determine the source of an inherent temporal instability in the spatial distribution and the emission current obtained from field electron-emitting carbon fiber tips of type Polyacrylonitrile VPR – 19, thermally treated at 2800 °C. These instability effects have been successfully overcome by coating the carbon fiber tip with a sub-micron layer of polystyrene . The current-voltage characteristics, Fowler-Nordheim plots, Murphy-Good plots and the scanning electron micrographs in addition to the field electron emission patterns were used in this investigation to study the emission characteristics of carbon fiber tips before and after samples are being coated with polystyrene layer. Comparison between the emission process from the clean and composite tips are reported and the current-voltage characteristics were obtained at a threshold field that is a few times lower than that of the clean tip. At low emission current levels linear Fowler-Nordheim and Murphy-Good plots were obtained with a slope value lower than that of the clean tip. The spatial distribution consisted of a very bright spot without any internal structure. These results suggest that a polystyrene coated fiber tip offers better performance than the clean carbon fiber tip as a new field electron emission source.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/LM2018110" target="_blank" >LM2018110: Výzkumná infrastruktura CzechNanoLab</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Advances in Materials and Processing Technologies

ISSN

2374-0698

e-ISSN

—

Svazek periodika

8

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

19

Strana od-do

„2652“-„2671 “

Kód UT WoS článku

000663227800001

EID výsledku v databázi Scopus

2-s2.0-85108182805