Field Emission from Self-Assembled Arrays of Lanthanum Monosulfide Nanoprotrusions
| Autor: | Marc Cahay, J. W. Fraser, D. J. Lockwood, Vu Thien Binh, S. Fairchild, S. Pramanik, K. Garre, V. Semet, L. Grazulis, B. Kanchibotla, Supriyo Bandyopadhyay |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
010302 applied physics
Materials science Field (physics) Article Subject business.industry 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Aspect ratio (image) Pulsed laser deposition Anode Field emission microscopy Field electron emission Environmental chemistry lcsh:Technology (General) 0103 physical sciences lcsh:T1-995 Optoelectronics General Materials Science Work function Thin film 0210 nano-technology business |
| Zdroj: | Journal of Nanomaterials, Vol 2008 (2008) |
| ISSN: | 1687-4110 |
| DOI: | 10.1155/2008/682920 |
| Popis: | The field emission properties of LaS nanoprotrusions called nanodomes, formed by pulsed laser deposition on porous anodic alumina films, have been analyzed with scanning anode field emission microscopy. The voltage necessary to produce a given field emission current is∼3.5 times less for nanodomes than for thin films. Assuming the same work function for LaS thin films and nanoprotrusions, that is,∼1 eV, a field enhancement factor of∼5.8 is extracted for the nanodome emitters from Fowler-Nordheim plots of the field emission data. This correlates well with the aspect ratio of the tallest nanodomes observed in atomic force micrograph measurements. |
| Databáze: | OpenAIRE |
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