Indium tin oxide as a dual-band compatible stealth material with low infrared emissivity and strong microwave absorption

Xu, Yang; Wan, Gengping; Ma, Lingling; Zhang, Ying; Su, Yanran; Liu, Disheng; Wang, Guizhen

doi:10.1039/d2tc04722e

Cited by 13 publications

(4 citation statements)

References 60 publications

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“…Thermal management transparent coatings have been developed with indium tin oxide (ITO). , Despite such works, ITO is not the ideal material for wearable technology upscaling, as elevated temperatures or magnetron sputtering methods are necessary for high-quality films, which is expensive and time-consuming. A scalable fabrication approach that does not form bilayers of AgNW networks for smaller nanowire spacing will be required to further improve the transparent radiation shield.…”

Section: Discussionmentioning

confidence: 99%

Solution-Processed Metallic Nanowire Network for Wearable Transparent Thermal Radiation Shield

Higueros,

Wang,

Sui

et al. 2024

ACS Nano

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Heating requirements for residential and commercial dwellings result in significant energy consumption and deleterious environmental effects. Personal radiative thermal management textiles regulate the wearer’s body temperature by controlling the material’s intrinsic optical properties. Passive heating textiles suppress radiative heat losses and therefore significantly reduce the energy consumption required for building heating systems. Guided by an optical theoretical approach, a transparent radiation shield (TRS) is designed based on silver nanowires (AgNWs) that can suppress human body heat with simultaneous visible light transmittance anticipated for practical fabrics. We experimentally demonstrated a TRS with large infrared light reflectance (low emissivity of 35%) and a visible (VIS) transparency value of 75% (400–800 nm). The results are well corroborated by the Mie scattering theory and the wire-mesh equivalent sheet impedance model, which provide fundamental mechanism understanding and guidance toward higher performance. The TRS is fabricated by a simple, solution-processing method with thermoplastic elastomer protective layers, granting notable stretching capabilities, mechanical robustness, and conformability to any body shape or object. The rigorous theoretical strategy enables the scalable synthesis of low-emissivity and visibly transparent textiles for personal thermal comfort.

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Section: Discussionmentioning

confidence: 99%

Solution-Processed Metallic Nanowire Network for Wearable Transparent Thermal Radiation Shield

Higueros,

Wang,

Sui

et al. 2024

ACS Nano

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“…The calculated lattice constants showed a notable agreement with known reference values (JCPDS card No. 71-2194) [18][19][20].…”

Section: X-ray Diffraction Microscopy Measurementsmentioning

confidence: 99%

Monolithic Use of Inert Gas for Highly Transparent and Conductive Indium Tin Oxide Thin Films

Alabdan,

Alsahli,

Bhandari

et al. 2024

Nanomaterials

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Due to its excellent electrical conductivity, high transparency in the visible spectrum, and exceptional chemical stability, indium tin oxide (ITO) has become a crucial material in the fields of optoelectronics and nanotechnology. This article provides a thorough analysis of growing ITO thin films with various thicknesses to study the impact of thickness on their electrical, optical, and physical properties for solar-cell applications. ITO was prepared through radio frequency (RF) magnetron sputtering using argon gas with no alteration in temperature or changes in substrate heating, followed with annealing in a tube furnace under inert conditions. An investigation of the influence of thickness on the optical, electrical, and physical properties of the films was conducted. We found that the best thickness for ITO thin films was 100 nm in terms of optical, electrical, and physical properties. To gain full comprehension of the impact on electrical properties, the different samples were characterized using a four-point probe and, interestingly, we found a high conductivity in the range of 1.8–2 × 106 S/m, good resistivity that did not exceed 1–2 × 10−6 Ωm, and a sheet resistance lower than 16 Ω sq−1. The transparency values found using a spectrophotometer reached values beyond 85%, which indicates the high purity of the thin films. Atomic force microscopy indicated a smooth morphology with low roughness values for the films, indicating an adequate transitioning of the charges on the surface. Scanning electron microscopy was used to study the actual thicknesses and the morphology, through which we found no cracks or fractures, which implied excellent deposition and annealing. The X-ray diffraction microscopy results showed a high purity of the crystals, as the peaks (222), (400), (440), and (622) of the crystallographic plane reflections were dominant, which confirmed the existence of the faced-center cubic lattice of ITO. This work allowed us to design a method for producing excellent ITO thin films for solar-cell applications.

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“…It is interesting that the plasmon peak of ITO can be tuned from ∼5000 to ∼3000 cm –1 via adjusting its dopant level. , The LSPR resonance is closely related to the free electrons produced by introducing a foreign atom of Sn 4+ into the matrix of In 2 O 3 as n-type doping, which can be further explained by the modified Drude model . Due to its tunability in the infrared region, ITO has great potential in the fields of infrared reflection material, − infrared stealth material, − infrared manipulation, − thermal shielding coating, ,− and smart glass. − Although ITO has been widely used for applications concerned with infrared, to the best of our knowledge, the research of ITO’s LSPR and its coupling effect in infrared reflection enhancement is still at large.…”

Section: Introductionmentioning

confidence: 99%

Electrospun ITO/PAN Nanofiber Mat for Infrared Reflection and Thermal Insulation

Xu,

Zhong,

Liu

et al. 2023

ACS Appl. Opt. Mater.

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The heat release of ambient temperature objects (0−100 °C) is often in the form of mid-to far-infrared radiation outward (∼4000 to 200 cm −1 ). In order to maintain warm objects, it is theoretically feasible to construct a kind of flexible material with infrared reflection ability targeting the band of mid-to far-infrared. In this paper, we proposed a type of nanofiber mat with excellent infrared reflection and thermal insulation performance. The ITO nanoclusters were introduced into the polyacrylonitrile (PAN) nanofibers via the electrospinning technique. The performed experimental test proved that the infrared reflection ability of the nanofiber mat can be enhanced because of the increased diameter of nanofiber upon the introduction of the ITO nanocluster as well as the localized surface plasmon resonance (LSPR) effects of ITO nanoclusters in the mid-to far-infrared range. It worth mentioning that the prepared nanofiber mat showed good air-permeability and mechanical properties due to the PAN matrix. Moreover, the performed experiments and numerical simulation analysis also suggested improved infrared reflection performance with respect to the size of aggregated ITO nanoclusters and their LSPR coupling effects in the nanofiber mat. The performed thermal insulation tests also indicated that the electrospun ITO/PAN nanofiber mat is promising for the thermal insulation of ambient temperature objects via IR radiation regulation.

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Indium tin oxide as a dual-band compatible stealth material with low infrared emissivity and strong microwave absorption

Abstract: With the explosive development of modern military detection technology, stealth compatibility for materials with both outstanding microwave absorption (MA) and low infrared emissivity is urgently needed. In this paper, indium...

Cited by 13 publications

References 60 publications

Solution-Processed Metallic Nanowire Network for Wearable Transparent Thermal Radiation Shield

Solution-Processed Metallic Nanowire Network for Wearable Transparent Thermal Radiation Shield

Monolithic Use of Inert Gas for Highly Transparent and Conductive Indium Tin Oxide Thin Films

Electrospun ITO/PAN Nanofiber Mat for Infrared Reflection and Thermal Insulation

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