Field emission properties of carbon nanotubes grown on Co/TiN coated Ta substrate for cathode in microwave power amplifier
| Autor: | Jae-Hee Han, Ji-Beom Yoo, Do Yoon Kim, In Taek Han, Chong-Yun Park, J. M. Kim, Jin Ju Choi, Tae Young Lee, Taewon Jung |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Mechanical Engineering Amplifier Analytical chemistry chemistry.chemical_element Nanotechnology General Chemistry Substrate (electronics) Carbon nanotube Cathode Electronic Optical and Magnetic Materials law.invention Field electron emission chemistry law Materials Chemistry Electrical and Electronic Engineering Current (fluid) Tin Current density |
| Zdroj: | Diamond and Related Materials. 13:987-993 |
| ISSN: | 0925-9635 |
| DOI: | 10.1016/j.diamond.2003.11.014 |
| Popis: | For field emitters as a cathode of traveling wave tube–microwave power amplifiers (TWT–MPA), field-emission (FE) properties of in situ grown carbon nanotubes (CNTs) onto electrically conducting substrate were systematically characterized. CNTs grown on the Co/TiN coated Ta substrate with properly controlled process exhibited the best FE property. The maximum current density and corresponding total emission current were 3.5 mA/cm 2 and ∼1.7 mA at 21.6 V/μm, respectively. Details on the correlation between the FE properties and the morphological parameters will be discussed. |
| Databáze: | OpenAIRE |
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