Outstanding Radiation Tolerance of Supported Graphene: Towards 2D Sensors for the Space Millimeter Radioastronomy

Outstanding Radiation Tolerance of Supported Graphene: Towards 2D Sensors for the Space Millimeter Radioastronomy

We experimentally and theoretically investigated the effects of ionizing radiation on a stack of graphene sheets separated by polymethyl methacrylate (PMMA) slabs. The exceptional absorption ability of such a heterostructure in the THz range makes it promising for use in a graphene-based THz bolomet...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Vol. 11; no. 1; p. 170
Main Authors: Paddubskaya, Alesia, Batrakov, Konstantin, Khrushchinsky, Arkadiy, Kuten, Semen, Plyushch, Artyom, Stepanov, Andrey, Remnev, Gennady, Shvetsov, Valery, Baah, Marian, Svirko, Yuri, Kuzhir, Polina
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 11-01-2021
MDPI
Subjects:
Absorption
Bolometers
Carbon
Damage
Defects
geostationary orbit
Geosynchronous orbits
Graphene
Gravitational waves
Heterostructures
Ion beams
Ion bombardment
Ionizing radiation
Ions
Irradiation
Multilayers
Polymers
Polymethyl methacrylate
Polymethylmethacrylate
Protons
Radiation tolerance
Sheets
Slabs
terahertz
geostationary orbit
absorption
terahertz
graphene
ionizing radiation
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Summary:We experimentally and theoretically investigated the effects of ionizing radiation on a stack of graphene sheets separated by polymethyl methacrylate (PMMA) slabs. The exceptional absorption ability of such a heterostructure in the THz range makes it promising for use in a graphene-based THz bolometer to be deployed in space. A hydrogen/carbon ion beam was used to simulate the action of protons and secondary ions on the device. We showed that the graphene sheets remain intact after irradiation with an intense 290 keV ion beam at the density of 1.5 × 1012 cm-2. However, the THz absorption ability of the graphene/PMMA multilayer can be substantially suppressed due to heating damage of the topmost PMMA slabs produced by carbon ions. By contrast, protons do not have this negative effect due to their much longer mean free pass in PMMA. Since the particles' flux at the geostationary orbit is significantly lower than that used in our experiments, we conclude that it cannot cause tangible damage of the graphene/PMMA based THz absorber. Our numerical simulations reveal that, at the geostationary orbit, the damaging of the graphene/PMMA multilayer due to the ions bombardment is sufficiently lower to affect the performance of the graphene/PMMA multilayer, the main working element of the THz bolometer, which remains unchanged for more than ten years.
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ISSN:2079-4991
2079-4991
DOI:10.3390/nano11010170