Transparency of graphene for low-energy electrons measured in a vacuum-triode setup

Journal Article · Wed Jul 01 00:00:00 EDT 2015 · APL Materials

DOI:https://doi.org/10.1063/1.4927406· OSTI ID:22499233

Hassink, G.; Wanke, R.; Rastegar, I.; Braun, W.; Stephanos, C.; Herlinger, P.; Smet, J. H.; Mannhart, J. ^[1]

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1. Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart (Germany)

Graphene, being an atomically thin conducting sheet, is a candidate material for gate electrodes in vacuum electronic devices, as it may be traversed by low-energy electrons. The transparency of graphene to electrons with energies between 2 and 40 eV has been measured by using an optimized vacuum-triode setup. The measured graphene transparency equals ∼60% in most of this energy range. Based on these results, nano-patterned sheets of graphene or of related two-dimensional materials are proposed as gate electrodes for ambipolar vacuum devices.

• OSTI ID: 22499233
• Journal Information: APL Materials, Vol. 3, Issue 7; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2166-532X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ELECTRODES
ELECTRONIC EQUIPMENT
ELECTRONS
GRAPHENE
OPACITY