Schottky emitters with carbon nanotubes as electron source

Phan Ngoc Minh, Nguyen Tuan Hong, Ngo Quang Minh, Phan Hong Khoi, Yuka Nomura, Takahito Ono, Masayoshi Esashi

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

In this paper we present a simple approach for making a Schottky emitter with Carbon Nanotubes (CNTs). A tungsten wire of 0.3 mm diameter was used as a heating filament. An iron rod of 0.3 mm diameter having a sharp tip was weld-bonded to the filament. By heating the filament to around 750°C in a mixture of (C2H2+Ar), multi-wall CNTs was grown at the Fe tip. Electron field emission and thermal-field emission properties of the fabricated Schottky emitter were measured at different temperatures. At room temperature, the field emission current well obeyed the Fowler-Nordheim (F-N) mechanism with threshold voltage of around 0.2 V/μm. At the temperature of higher than 780°C, the thermal-field emission dominated and both field emission and thermal-field emission were very stable with very low fluctuation. Enhancement factor of 1.3 ×107 m-1 and work function of 4.95 eV were evaluated for the grown CNTs. The mentioned CNT-Schottky emitters for advanced electron beam instruments are expected.

本文言語English
ホスト出版物のタイトルTRANSDUCERS '05 - 13th International Conference on Solid-State Sensors and Actuators and Microsystems - Digest of Technical Papers
ページ267-270
ページ数4
出版ステータスPublished - 2005 11 9
イベント13th International Conference on Solid-State Sensors and Actuators and Microsystems, TRANSDUCERS '05 - Seoul, Korea, Republic of
継続期間: 2005 6 52005 6 9

出版物シリーズ

名前Digest of Technical Papers - International Conference on Solid State Sensors and Actuators and Microsystems, TRANSDUCERS '05
1

Other

Other13th International Conference on Solid-State Sensors and Actuators and Microsystems, TRANSDUCERS '05
CountryKorea, Republic of
CitySeoul
Period05/6/505/6/9

ASJC Scopus subject areas

  • Engineering(all)

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