Influence of RuO[sub 2] nanoparticles on electron emission from carbon nanotubes
| Autor: | Shigeki Kato, Tsuneyuki Noguchi, Huarong Liu |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Nanotube
Materials science Field (physics) Contact resistance Nanoparticle Nanotechnology Electron Carbon nanotube Condensed Matter Physics Molecular physics law.invention Condensed Matter::Materials Science Field electron emission law Condensed Matter::Superconductivity Vaporization Electrical and Electronic Engineering |
| Zdroj: | Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures. 25:1814 |
| ISSN: | 1071-1023 |
| DOI: | 10.1116/1.2794053 |
| Popis: | The authors studied the influence of RuO2 nanoparticles attached to multiwalled carbon nanotube (MWCNT) emitters on field emission. The threshold field, corresponding to 10mA∕cm2, was reduced 30% to ∼0.90V∕μm after attaching the particles. However, the particles deteriorated the stability of field emitters to some extent, especially in the high emission-current-density region of several A∕cm2. The maximum emission-current density was limited to a lower current region compared with field emitters without RuO2. This can be explained reasonably by considering the vaporization of RuO2 particles that frequently causes significant self-ion-sputtering during strong emission because of the large contact resistance between the particles and MWCNTs. This explanation was experimentally proved by measuring the reduction of field-enhancement factor with the elapsed-emission time. This reduction is quicker for emitters with RuO2 than for emitters without RuO2. Experimental data also show that the standard deviation of ... |
| Databáze: | OpenAIRE |
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