Field emission spectroscopy of nanographite films

Author

Mingels, S. ; Muller, Gunter ; Bandurin, D.A. ; Kleshch, V.I. ; Obraztsov, A.N.

Author_Institution

FB C Phys. Dept., Univ. of Wuppertal, Wuppertal, Germany

fYear

2014

fDate

6-10 July 2014

Firstpage

139

Lastpage

140

Abstract

Nanocarbon films with high aspect ratio graphite crystallites were fabricated by plasma-enhanced chemical vapor deposition. In order to reveal the origin of their extraordinary field emission properties, integral current-voltage curves and electron spectra from two nanographite cathodes with different morphology were measured in triode configuration. An average current density of about 1 mA/cm² was reproducibly obtained at an applied field of 1.2-1.8 V/μm due to high field enhancement. Most remarkably, above a threshold field the electron spectra of both samples revealed two peaks with different field-dependent shift to lower energy. The role of sp³ surface states for these results will be discussed at the conference.

Keywords

cathodes; crystallites; current density; electron field emission; graphite; nanofabrication; nanostructured materials; plasma CVD; surface states; thin films; triodes; C; current density; electron spectra; field emission properties; field emission spectroscopy; high aspect ratio graphite crystallites; high field enhancement; integral current-voltage curves; morphology; nanocarbon films; nanographite cathodes; nanographite films; plasma-enhanced chemical vapor deposition; surface states; threshold field; triode configuration; field emission spectroscopy; nanographite films;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Nanoelectronics Conference (IVNC), 2014 27th International

Conference_Location

Engelberg

Print_ISBN

978-1-4799-5306-6

Type

conf

DOI

10.1109/IVNC.2014.6894817

Filename

6894817