Graphene-Based Adaptive Thermal Camouflage

dc.contributor.authorSalihoğlu, Ömeren_US
dc.contributor.authorUzlu, H. B.en_US
dc.contributor.authorYakar, Ozanen_US
dc.contributor.authorAas, Shahnazen_US
dc.contributor.authorBalci, Osmanen_US
dc.contributor.authorKakenov, Nurbeken_US
dc.contributor.authorBalci, S.en_US
dc.contributor.authorOlcum, S.en_US
dc.contributor.authorSüzer, Şefiken_US
dc.contributor.authorKocabas, Coşkunen_US
dc.contributor.bilkentauthorSalihoğlu, Ömeren_US
dc.contributor.bilkentauthorYakar, Ozanen_US
dc.contributor.bilkentauthorAas, Shahnazen_US
dc.contributor.bilkentauthorBalci, Osmanen_US
dc.contributor.bilkentauthorKakenov, Nurbeken_US
dc.contributor.bilkentauthorSüzer, Şefiken_US
dc.contributor.bilkentauthorKocabas, Coşkunen_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractIn 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.
dc.description.sponsorshipC.K. acknowledges the financial support from European Research Counsel for ERC-Consolidator Grant SmartGra-phene 682723. C.K. acknowledges BAGEP Award of the Science Academy.
dc.publisherAmerican Chemical Society
dc.relation.project682723 - Bilim Akademisi
dc.source.titleNano Lettersen_US
dc.subjectelectrolyte gatingen_US
dc.subjectGraphene optoelectronicsen_US
dc.subjectHeat managementen_US
dc.subjectIR opticsen_US
dc.subjectMultilayer grapheneen_US
dc.subjectReconfigurable surfaceen_US
dc.subjectThermal camouflageen_US
dc.subjectThermal emissionen_US
dc.subjectVariable emissivityen_US
dc.titleGraphene-Based Adaptive Thermal Camouflageen_US
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