CNTs and CNT/ZnO nanostructures for use as electron sources

Milne W., Li C., Zhang Y., Hiralal P., Mann M., Cole M., ...Daha Fazla

8th International Vacuum Electron Sources Conference, IVESC 2010 and NANOcarbon 2010, Nanjing, Çin, 14 - 16 Ekim 2010, ss.2, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/ivesc.2010.5644374
  • Basıldığı Şehir: Nanjing
  • Basıldığı Ülke: Çin
  • Sayfa Sayıları: ss.2
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

The aim of this paper is to describe the growth and optimization of carbon nanotube (CNT) and CNT/Zinc Oxide nanostructures to produce novel electron sources. The emitters studied in this project are based on regular array of vertically aligned 5 μm height and 50 nm diameter CNTs with a pitch of 10 μm as described previously (1). Such a cathode design allows us to minimize electric field shielding effects and thus to help in optimizing the emitted current density. We have previously obtained a current density of 1 A/cm 2 from such arrays in DC mode, and over 12 A/cm2 in pulsed mode at RF frequencies. © 2010 IEEE.