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Radio-Frequency-Transparent, Electrically Conductive Graphene Nanoribbon Thin Films as Deicing Heating Layers
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posted on 2014-01-08, 00:00 authored by Vladimir Volman, Yu Zhu, Abdul-Rahman
O. Raji, Bostjan Genorio, Wei Lu, Changsheng Xiang, Carter Kittrell, James M. TourDeicing heating layers are frequently
used in covers of large radio-frequency (RF) equipment, such as radar,
to remove ice that could damage the structures or make them unstable.
Typically, the deicers are made using a metal framework and inorganic
insulator; commercial resistive heating materials are often nontransparent
to RF waves. The preparation of a sub-skin-depth thin film, whose
thickness is very small relative to the RF skin (or penetration) depth,
is the key to minimizing the RF absorption. The skin depth of typical
metals is on the order of a micrometer at the gigahertz frequency
range. As a result, it is very difficult for conventional conductive
materials (such as metals) to form large-area sub-skin-depth films.
In this report, we disclose a new deicing heating layer composite
made using graphene nanoribbons (GNRs). We demonstrate that the GNR
film is thin enough to permit RF transmission. This metal-free, ultralight,
robust, and scalable graphene-based RF-transparent conductive coating
could significantly reduce the size and cost of deicing coatings for
RF equipment covers. This is important in many aviation and marine
applications. This is a demonstration of the efficacy and applicability
of GNRs to afford performances unattainable by conventional materials.
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conductive materialsRF wavesgigahertz frequency rangeheating materialsmetal frameworkRF equipmentgraphene nanoribbonsskin depthGNR filmRF absorptionRF transmissiondeicing coatingsRF skindeicing heating layerElectrically Conductive Graphene Nanoribbonmarine applicationsDeicing Heating LayersDeicing heating layers
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