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Title: Graphene-based adaptive thermal camouflage
Authors: Salihoğlu, Ömer
Uzlu, Hasan Burkay
Yakar, Ozan
Aas, Shahnaz
Balcı, Osman
Kakenov, Nurbek
Balcı, Sinan
Olçum, Selim
Süzer, Şefik
Kocabaş, Coşkun
Keywords: Electrolyte gating
Graphene optoelectronics
Heat management
Thermal emissions
Multilayer graphene
Reconfigurable surfaces
Thermal camouflage
Issue Date: Jul-2018
Publisher: American Chemical Society
Source: Salihoğlu, Ö., Uzlu, H. B., Yakar, O., Aas, S., Balcı, O., Kakenov, N., Balcı, S., Olçum, S., Süzer, Ş., and Kocabaş, C. (2018). Graphene-based adaptive thermal camouflage. Nano Letters, 18(7), 4541-4548. doi:10.1021/acs.nanolett.8b01746
Abstract: In nature, adaptive coloration has been effectively utilized for concealment and signaling. Various biological mechanisms have evolved to tune the reflectivity for visible and ultraviolet light. These examples inspire many artificial systems for mimicking adaptive coloration to match the visual appearance to their surroundings. Thermal camouflage, however, has been an outstanding challenge which requires an ability to control the emitted thermal radiation from the surface. Here we report a new class of active thermal surfaces capable of efficient real-time electrical-control of thermal emission over the full infrared (IR) spectrum without changing the temperature of the surface. Our approach relies on electro-modulation of IR absorptivity and emissivity of multilayer graphene via reversible intercalation of nonvolatile ionic liquids. The demonstrated devices are light (30 g/m2), thin (<50 μm), and ultraflexible, which can conformably coat their environment. In addition, by combining active thermal surfaces with a feedback mechanism, we demonstrate realization of an adaptive thermal camouflage system which can reconfigure its thermal appearance and blend itself with the varying thermal background in a few seconds. Furthermore, we show that these devices can disguise hot objects as cold and cold ones as hot in a thermal imaging system. We anticipate that, the electrical control of thermal radiation would impact on a variety of new technologies ranging from adaptive IR optics to heat management for outer space applications.
ISSN: 1530-6984
Appears in Collections:Photonics / Fotonik
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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