Fabrication of radiative cooling devices using Si&lt;sub&gt;2&lt;/sub&gt;N&lt;sub&gt;2&lt;/sub&gt;O nano-particles

Miyazaki, Hitoshi; Okada, Kazuya; Jinno, Kenta; Ota, Toshitaka

doi:10.2109/jcersj2.16164

Cited by 20 publications

(13 citation statements)

References 8 publications

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“…IR radiative cooling at nighttime can be easily realized by advanced functional materials with broadband high emissivity in the IR range. For this purpose, multitudinous materials and systems have been widely investigated, such as polymer‐based IR radiative cooling materials, [ 63 ] inorganic coating materials, [ 64 ] and selectively IR‐emitting gas. [ 65 ] However, developing advanced functional materials for IR radiative cooling in the daytime is a formidable and challenging task, due to the strict requirement that materials should simultaneously possess high reflectivity in the solar spectrum and high emissivity in the IR transparency window.…”

Section: Bioinspired Adaptive Materials For Infrared Radiative Coolingmentioning

confidence: 99%

Beyond the Visible: Bioinspired Infrared Adaptive Materials

et al. 2021

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Infrared (IR) adaptation phenomena are ubiquitous in nature and biological systems. Taking inspiration from natural creatures, researchers have devoted extensive efforts for developing advanced IR adaptive materials and exploring their applications in areas of smart camouflage, thermal energy management, biomedical science, and many other IR‐related technological fields. Herein, an up‐to‐date review is provided on the recent advancements of bioinspired IR adaptive materials and their promising applications. First an overview of IR adaptation in nature and advanced artificial IR technologies is presented. Recent endeavors are then introduced toward developing bioinspired adaptive materials for IR camouflage and IR radiative cooling. According to the Stefan‐Boltzmann law, IR camouflage can be realized by either emissivity engineering or thermal cloaks. IR radiative cooling can maximize the thermal radiation of an object through an IR atmospheric transparency window, and thus holds great potential for use in energy‐efficient green buildings and smart personal thermal management systems. Recent advances in bioinspired adaptive materials for emerging near‐IR (NIR) applications are also discussed, including NIR‐triggered biological technologies, NIR light‐fueled soft robotics, and NIR light‐driven supramolecular nanosystems. This review concludes with a perspective on the challenges and opportunities for the future development of bioinspired IR adaptive materials.

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Section: Bioinspired Adaptive Materials For Infrared Radiative Coolingmentioning

confidence: 99%

Beyond the Visible: Bioinspired Infrared Adaptive Materials

et al. 2021

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“…[ 165 ] It was reported in another work that SiO 2 particles were heated with Si powders, resulting in Si 2 N 2 O particles for another particle‐based IRSE (Figure 19e). [ 166 ]…”

Section: Mechanism and Recent Progress Of Irsesmentioning

confidence: 99%

“…B Bhatia had demonstrated such a method to achieve a 6 °C subambient temperature. [ 166 ] A Similar method was also applied in the humid area to maximize the cooling effect in the daytime. [ 154 ] However, this method is impractical if the desired cooling area is large.…”

Section: Mechanism and Recent Progress Of Irsesmentioning

confidence: 99%

Spectrally Selective Absorbers/Emitters for Solar Steam Generation and Radiative Cooling‐Enabled Atmospheric Water Harvesting

Lin

Huang

et al. 2020

Global Challenges

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Renewable energy harvesting from the sun and outer space have aroused significant interest over the past decades due to their great potential in addressing the energy crisis. Furthermore, the harvested renewable energy has benefited another global challenge, water scarcity. Both solar steam generation and passive radiative cooling‐enabled atmospheric water harvesting are promising technologies that produce freshwater in green and sustainable ways. Spectral control is extremely important to achieve high efficiency in the two complementary systems based on absorbing/emitting light in a specific wavelength range. For this reason, a broad variety of solar absorbers and IR emitters with great spectral selectivity have been developed. Although operating in different spectral regions, solar selective absorbers and IR selective emitters share similar design strategies. At this stage, it is urgent and necessary to review their progress and figure out their common optical characteristics. Herein, the fundamental mechanisms and recent progress in solar selective absorbers and IR selective emitters are summarized, and their applications in water production are reported. This review aims to identify the importance of selective absorbers/emitters and inspire more research works on selective absorbers/emitters through the summary of advances and the establishment of the connection between solar absorbers and IR emitters.

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“…They found that the cooling performance of oxynitride is superior to that offered by nitride/dioxide bilayers. Using nano-particles, Miyazaki [61] even synthesized Si 2 N 2 O and coated it to Al substrates. The temperature of the 6.5-µm-thick film and 13.5-µm-thick film achieved an average 0.82 • C and 0.44 • C temperature drop below the ambient air temperature.…”

Section: Selective Coolersmentioning

confidence: 99%

Recent Progress in Daytime Radiative Cooling: Is It the Air Conditioner of the Future?

2018

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Radiative cooling is a well-researched area. For many years, surfaces relying on radiative cooling failed to exhibit a sub-ambient surface temperature under the sun because of the limited reflectance in the solar spectrum and the reduced absorptivity in the atmospheric window. The recent impressive developments in photonic nanoscience permitted to produce photonic structures exhibiting surface temperatures much below the ambient temperature. This paper aims to present and analyze the main recent achievements concerning daytime radiative cooling technologies. While the conventional radiative systems are briefly presented, the emphasis is given on the various photonic radiative structures and mainly the planar thin film radiators, metamaterials, 2 and 3D photonic structures, polymeric photonic technologies, and passive radiators under the form of a paint. The composition of each structure, as well as its experimental or simulated thermal performance, is reported in detail. The main limitations and constraints of the photonic radiative systems, the proposed technological solutions, and the prospects are presented and discussed.

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Fabrication of radiative cooling devices using Si<sub>2</sub>N<sub>2</sub>O nano-particles

Cited by 20 publications

References 8 publications

Beyond the Visible: Bioinspired Infrared Adaptive Materials

Beyond the Visible: Bioinspired Infrared Adaptive Materials

Spectrally Selective Absorbers/Emitters for Solar Steam Generation and Radiative Cooling‐Enabled Atmospheric Water Harvesting

Recent Progress in Daytime Radiative Cooling: Is It the Air Conditioner of the Future?

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