Cephalopod-inspired versatile design based on plasmonic VO2 nanoparticle for energy-efficient mechano-thermochromic windows

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Ke, Y
Zhang, Q
Wang, T
Wang, S
Li, N
Lin, G
Liu, X
Dai, Z
Yan, J
Yin, J
Magdassi, S
Zhao, D
Long, Y
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2020
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Abstract

Privacy and energy-saving are key functionalities for next-generation smart windows, while to achieve them independently on a window is challenging. Inspired by the cephalopod skin, we have developed a versatile thermo- and mechano-chromic design to overcome such challenge and reveal the mechanism via both experiments and simulations. The design is facile with good scalability, consisted of well-dispersed vanadium dioxide (VO2) nanoparticles (NPs) with temperature-dependent localized surface plasmon resonance (LSPR) in transparent elastomers with dynamic micro wrinkles. While maintaining a fixed solar energy modulation of (ΔTsol), the design can dynamically control visible transmittance (Tvib) from 60% to 17%, adding a new dimension to VO2-based smart windows. We prove that the optical modulation relies on the microtexture-induced broadband diffraction and the plasmon-enhanced near-infrared absorbance of VO2 NPs. We further present a series of modified designs towards additional functionalities. This work opens an avenue for independent dual-mode windows and it may inspire development from fundamental material, optic, and mechanical science to energy-related applications.

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Nano Energy

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73

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Macromolecular and materials chemistry

Materials engineering

Nanotechnology

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Ke, Y; Zhang, Q; Wang, T; Wang, S; Li, N; Lin, G; Liu, X; Dai, Z; Yan, J; Yin, J; Magdassi, S; Zhao, D; Long, Y, Cephalopod-inspired versatile design based on plasmonic VO2 nanoparticle for energy-efficient mechano-thermochromic windows, Nano Energy, 2020, 73, pp. 104785

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