Facile and Widely Applicable Route to Self-Adaptive Emissivity Modulation: Energy-Saving Demonstration with Transparent Wood

Xin Hu; Wei Cai; Yingbo Zhang; Shuo Shi; Yang Ming; Rujun Yu; Daming Chen; Mengyan Yang; Faming Wang; Hongyu Yang; Chi Wai Kan; Nuruzzaman Noor; Bin Fei

doi:10.1021/acs.nanolett.3c03711

Facile and Widely Applicable Route to Self-Adaptive Emissivity Modulation: Energy-Saving Demonstration with Transparent Wood

Xin Hu, Wei Cai, Yingbo Zhang, Shuo Shi, Yang Ming, Rujun Yu, Daming Chen, Mengyan Yang, Faming Wang, Hongyu Yang, Chi Wai Kan, Nuruzzaman Noor, Bin Fei

Research output: Journal article publication › Journal article › Academic research › peer-review

13 Citations (Scopus)

Abstract

The cooling power provided by radiative cooling is unwanted during cold hours. Therefore, self-adaptive regulation is desired for radiative cooling, especially in all-weather applications. However, current routes for radiative cooling regulation are constrained by substrates and complicated processing. Here, self-adaptive radiative cooling regulation on various potential substrates (transparent wood, PET, normal glass, and cement) was achieved by a Fabry-Perot structure consisting of a silver nanowires (AgNWs) bottom layer, PMMA spacer, and W-VO₂ top layer. The emissivity-modulated transparent wood (EMTW) exhibits an emissivity contrast of 0.44 (ϵ_8-13-L = ∼0.19 and ϵ_8-13-H = ∼0.63), which thereby yields considerable energy savings across different climate zones. The emissivity contrast can be adjusted by varying the spinning parameters during the deposition process. Positive emissivity contrast was also achieved on three other industrially relevant substrates via this facile and widely applicable route. This proves the great significance of the approach to the promotion and wide adoption of radiative cooling regulation concept in the built environment.

Original language	English
Pages (from-to)	657-666
Number of pages	10
Journal	Nano Letters
Volume	24
Issue number	2
DOIs	https://doi.org/10.1021/acs.nanolett.3c03711
Publication status	Published - 17 Jan 2024

Keywords

Emissivity modulation
Energy saving
Fabry−Perot resonator
Radiative cooling
Transparent wood

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

More information

10.1021/acs.nanolett.3c03711

http://hdl.handle.net/10397/107986

Cite this

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title = "Facile and Widely Applicable Route to Self-Adaptive Emissivity Modulation: Energy-Saving Demonstration with Transparent Wood",

abstract = "The cooling power provided by radiative cooling is unwanted during cold hours. Therefore, self-adaptive regulation is desired for radiative cooling, especially in all-weather applications. However, current routes for radiative cooling regulation are constrained by substrates and complicated processing. Here, self-adaptive radiative cooling regulation on various potential substrates (transparent wood, PET, normal glass, and cement) was achieved by a Fabry-Perot structure consisting of a silver nanowires (AgNWs) bottom layer, PMMA spacer, and W-VO2 top layer. The emissivity-modulated transparent wood (EMTW) exhibits an emissivity contrast of 0.44 (ϵ8-13-L = ∼0.19 and ϵ8-13-H = ∼0.63), which thereby yields considerable energy savings across different climate zones. The emissivity contrast can be adjusted by varying the spinning parameters during the deposition process. Positive emissivity contrast was also achieved on three other industrially relevant substrates via this facile and widely applicable route. This proves the great significance of the approach to the promotion and wide adoption of radiative cooling regulation concept in the built environment.",

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AU - Shi, Shuo

AU - Ming, Yang

AU - Yu, Rujun

AU - Chen, Daming

AU - Yang, Mengyan

AU - Wang, Faming

AU - Yang, Hongyu

AU - Kan, Chi Wai

AU - Noor, Nuruzzaman

AU - Fei, Bin

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AB - The cooling power provided by radiative cooling is unwanted during cold hours. Therefore, self-adaptive regulation is desired for radiative cooling, especially in all-weather applications. However, current routes for radiative cooling regulation are constrained by substrates and complicated processing. Here, self-adaptive radiative cooling regulation on various potential substrates (transparent wood, PET, normal glass, and cement) was achieved by a Fabry-Perot structure consisting of a silver nanowires (AgNWs) bottom layer, PMMA spacer, and W-VO2 top layer. The emissivity-modulated transparent wood (EMTW) exhibits an emissivity contrast of 0.44 (ϵ8-13-L = ∼0.19 and ϵ8-13-H = ∼0.63), which thereby yields considerable energy savings across different climate zones. The emissivity contrast can be adjusted by varying the spinning parameters during the deposition process. Positive emissivity contrast was also achieved on three other industrially relevant substrates via this facile and widely applicable route. This proves the great significance of the approach to the promotion and wide adoption of radiative cooling regulation concept in the built environment.

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Facile and Widely Applicable Route to Self-Adaptive Emissivity Modulation: Energy-Saving Demonstration with Transparent Wood

Abstract

Keywords

ASJC Scopus subject areas

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