Microelectrode for energy and current control of nanotip field electron emitters

Journal Article · Mon Nov 18 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4831735· OSTI ID:22254007

Lüneburg, S.; Ernstorfer, R. ^[1]

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1. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)

Emerging experiments and applications in electron microscopy, holography, and diffraction benefit from miniaturized electron guns for compact experimental setups. We present a highly compact microelectrode integrated field emitter that consists of a tungsten nanotip coated with a few micrometers thick polyimide film followed by a several nanometers thick gold film, both positioned behind the exposed emitter apex by approximately 10–30 μm. The control of the electric field strength at the nanometer scale tip apex allows suppression, extraction, and energy tuning of field-emitted electrons. The performance of the microelectrode is demonstrated experimentally and supported by numerical simulations.

• OSTI ID: 22254007
• Journal Information: Applied Physics Letters, Vol. 103, Issue 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
COMPUTERIZED SIMULATION
CONTROL
DIFFRACTION
ELECTRIC FIELDS
ELECTRON GUNS
ELECTRON MICROSCOPY
FILMS
GOLD
TUNGSTEN