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Paradox of low field enhancement factor for field emission nanodiodes in relation to quantum screening effects
We put forward the quantum screening effect in field emission [FE] nanodiodes, explaining relatively low field enhancement factors due to the increased potential barrier that impedes the electron Fowler-Nordheim tunneling, which is usually observed in nanoscale FE experiments. We illustratively show...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3292933/ https://www.ncbi.nlm.nih.gov/pubmed/22333408 http://dx.doi.org/10.1186/1556-276X-7-125 |
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author | Cheng, Tsung-Chieh Chen, Pai-Yen Wu, Shen-Yao |
author_facet | Cheng, Tsung-Chieh Chen, Pai-Yen Wu, Shen-Yao |
author_sort | Cheng, Tsung-Chieh |
collection | PubMed |
description | We put forward the quantum screening effect in field emission [FE] nanodiodes, explaining relatively low field enhancement factors due to the increased potential barrier that impedes the electron Fowler-Nordheim tunneling, which is usually observed in nanoscale FE experiments. We illustratively show this effect from the energy band diagram and experimentally verify it by performing the nanomanipulation FE measurement for a single P-silicon nanotip emitter (Φ = 4.94eV), with a scanning tungsten-probe anode (work function, Φ = 4.5eV) that constitutes a 75-nm vacuum nanogap. A macroscopic FE measurement for the arrays of emitters with a 17-μm vacuum microgap was also performed for a fair comparison. |
format | Online Article Text |
id | pubmed-3292933 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Springer |
record_format | MEDLINE/PubMed |
spelling | pubmed-32929332012-03-06 Paradox of low field enhancement factor for field emission nanodiodes in relation to quantum screening effects Cheng, Tsung-Chieh Chen, Pai-Yen Wu, Shen-Yao Nanoscale Res Lett Nano Idea We put forward the quantum screening effect in field emission [FE] nanodiodes, explaining relatively low field enhancement factors due to the increased potential barrier that impedes the electron Fowler-Nordheim tunneling, which is usually observed in nanoscale FE experiments. We illustratively show this effect from the energy band diagram and experimentally verify it by performing the nanomanipulation FE measurement for a single P-silicon nanotip emitter (Φ = 4.94eV), with a scanning tungsten-probe anode (work function, Φ = 4.5eV) that constitutes a 75-nm vacuum nanogap. A macroscopic FE measurement for the arrays of emitters with a 17-μm vacuum microgap was also performed for a fair comparison. Springer 2012-02-14 /pmc/articles/PMC3292933/ /pubmed/22333408 http://dx.doi.org/10.1186/1556-276X-7-125 Text en Copyright ©2012 Cheng et al; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Nano Idea Cheng, Tsung-Chieh Chen, Pai-Yen Wu, Shen-Yao Paradox of low field enhancement factor for field emission nanodiodes in relation to quantum screening effects |
title | Paradox of low field enhancement factor for field emission nanodiodes in relation to quantum screening effects |
title_full | Paradox of low field enhancement factor for field emission nanodiodes in relation to quantum screening effects |
title_fullStr | Paradox of low field enhancement factor for field emission nanodiodes in relation to quantum screening effects |
title_full_unstemmed | Paradox of low field enhancement factor for field emission nanodiodes in relation to quantum screening effects |
title_short | Paradox of low field enhancement factor for field emission nanodiodes in relation to quantum screening effects |
title_sort | paradox of low field enhancement factor for field emission nanodiodes in relation to quantum screening effects |
topic | Nano Idea |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3292933/ https://www.ncbi.nlm.nih.gov/pubmed/22333408 http://dx.doi.org/10.1186/1556-276X-7-125 |
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