Thermal camouflaging metamaterials

Hu, Run; Xi, Wang; Liu, Yida; Tang, Kechao; Song, Jinlin; Luo, Xiaobing; Wu, Junqiao; Qiu, Cheng‐Wei

doi:10.1016/j.mattod.2020.11.013

Cited by 212 publications

(109 citation statements)

References 178 publications

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“…[6] Reducing the surface temperature and regulating the surface IR emissivity of an object are two main approaches to realize thermal camouflage. [7] Based on these strategies, various materials and systems, such as phase-change materials (PCMs), [2,8] thermal insulation materials, [9][10][11] metal film/coatings, [12][13][14] metasurfaces, [15][16][17][18][19] and several other methods, [20][21][22][23][24][25][26][27] have been developed to date. However, the following problems remain.…”

mentioning

confidence: 99%

Ultrathin Titanium Carbide (MXene) Films for High‐Temperature Thermal Camouflage

Shi

Liu

et al. 2021

Adv Funct Materials

144

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Thermal camouflage has attracted increasing attention owing to the rapid development of infrared (IR) surveillance technologies. Various materials and systems have been developed to date, but the realization of high-temperature thermal camouflage using ultrathin film/coating remains a great challenge; this is of great significance, especially for IR stealth in military equipment. This work demonstrates a series of ultrathin Ti 3 C 2 T x MXene films (as low as 1 µm) with superior high-temperature indoor/outdoor thermal camouflage performance: wide camouflage temperature range (from below −10 °C to over 500 °C), large reduction in radiation temperature (exceeding 300 °C for objects with temperatures over 500 °C), long-term high-temperature or fire stability, multifunctionality including disguised Joule heating capability, and high electromagnetic interference shielding efficiency. The superior high-temperature thermal camouflage performance of the ultrathin MXene film is attributed to its low mid-IR emissivity (0.19), which is comparable to that of stainless steel but far below that of other 2D nanomaterials, such as graphene. The multifunctional ultrathin MXene films prepared through simple vacuum-assisted filtration provide a feasible method for efficient high-temperature thermal camouflage using ultrathin films, demonstrating the great promise of MXene materials for thermal camouflage, IR stealth, counter-surveillance, and security protection.

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mentioning

confidence: 99%

Ultrathin Titanium Carbide (MXene) Films for High‐Temperature Thermal Camouflage

Shi

Liu

et al. 2021

Adv Funct Materials

144

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“…In addition to these remarkable thermal properties, the ability of graphene-based materials in distributing the impact force, their lightweight and improved ballistic properties make them suitable materials for military applications such as lighter and more comfortable military uniform, armor, and helmets ( Mittal et al., 2018 ). Advances in thermal camouflage technologies can also be developed using radiative and conductive strategies ( Hu et al., 2021 ). The increase in thermal conductivity with the use of these graphene- and boron-based materials contribute in the spreading of heat and passive cooling as well as storing thermal energy, influencing human skin lesser and diminishing burn injuries.…”

Section: Future Perspectivesmentioning

confidence: 99%

Improving thermal conductivities of textile materials by nanohybrid approaches

2022

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“…With the emergence of transformation thermotics and thermal metamaterials, the thermal cloak greatly attracted the interest of researchers. Based on the theory of transformation thermotics, researchers have constructed a number of varieties of thermal functional devices: for instance, thermal cloak [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ], thermal concentrator [ 13 , 14 ], thermal illusion [ 15 , 16 , 17 , 18 ], thermal camouflage [ 19 , 20 , 21 , 22 , 23 , 24 , 25 ], thermal rotator [ 26 ], and encrypted thermal printing [ 27 ]. The thermal cloak, as a typical representative of heat flux control devices, was first experimentally verified [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Thermal Cloaking in Silicon Film: A Molecular Dynamic Study

Zhang¹,

Zhang²,

Sun³

et al. 2022

Materials

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Nanoscale thermal shielding is becoming increasingly important with the miniaturization of microelectronic devices. They have important uses in the field of thermal design to isolate electronic components. Several nanoscale thermal cloaks based on graphene and crystalline silicon films have been designed and experimentally verified. No study has been found that simultaneously treats the functional region of thermal cloak by amorphization and perforation methods. Therefore, in this paper, we construct a thermal cloak by the above methods, and the ratio of thermal cloaking and response temperature is used to explore its cloaking performance under constant and dynamic temperature boundary. We find that compared with the dynamic boundary, the cloaking effect produced under the constant boundary is more obvious. Under two temperature boundaries, the thermal cloak composed of amorphous and perforated has a better performance and has the least disturbance to the background temperature field. The phonon localization effect produced by the amorphous structure is more obvious than that of the perforated structure. The phonon localization of the functional region is the main reason for the cloaking phenomenon, and the stronger the phonon localization, the lower the thermal conductivity and the more obvious the cloaking effect. Our study extends the nanoscale thermal cloak construction method and facilitates the development of other nanoscale thermal functional devices.

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Thermal camouflaging metamaterials

Cited by 212 publications

References 178 publications

Ultrathin Titanium Carbide (MXene) Films for High‐Temperature Thermal Camouflage

Ultrathin Titanium Carbide (MXene) Films for High‐Temperature Thermal Camouflage

Improving thermal conductivities of textile materials by nanohybrid approaches

Nanoscale Thermal Cloaking in Silicon Film: A Molecular Dynamic Study

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