Thermochromic VO2 film deposited on Al with tunable thermal emissivity for space applications

Benkahoul, M.; Chaker, Mohamed; Margot, J.; Haddad, E.; Kruzelecky, Roman V.; Wong, Brian J. F.; Jamroz, Wes; Poinas, P.

doi:10.1016/j.solmat.2011.08.014

Cited by 165 publications

(104 citation statements)

References 18 publications

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“…16 The metal-insulator transition can be influenced by a variety of external parameters, and recent work have considered the effects of strain [17][18][19] and lattice misfit with the substrate, 20,21 electric field or current activation, [22][23][24][25][26][27][28][29][30][31] light irradiation, [32][33][34][35][36][37][38] ion bombardment, 39,40 and gaseous ambience. 41 Considering the wealth of possibilities to modulate the properties of VO 2 -based thin films, it is not surprising that they are discussed for a vast number of applications such as thermochromic "smart" windows for energy efficient buildings, [42][43][44][45][46][47][48][49][50] variable-thermal-emittance surfaces for thermal radiation control, 51 oscillators and switches in (opto)electronics, 25,26,34,52,53 transistors of different types, 30,54,55 microcantilevers, 56,...…”

Section: Introductionmentioning

confidence: 99%

Thermochromic VO2 nanorods made by sputter deposition: Growth conditions and optical modeling

Namura

Suzuki

et al. 2013

Journal of Applied Physics

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Thermochromic VO 2 nanorods made by sputter deposition: Growth conditions and optical modeling. Reactive dc magnetron sputtering onto glass-based substrates yielded deposits of thermochromic VO 2 with well-developed nanorods and nanowires. Their formation was promoted by high substrate temperature (above ~500 °C), sufficient film thickness, proper inlet of the reactive gas, dispersed gold "seeds" and pronounced substrate roughness. Rutherford back scattering ascertained mass thicknesses, scanning electron microscopy depicted the nanostructures, and glancing incidence Xray diffraction proved that single-phase VO 2 was normally formed. Journal of Applied PhysicsSpectrophotometric measurements of total and diffuse transmittance and reflectance on VO 2 thin films, at room temperature and ~100 °C, allowed us to determine complex dielectric functions below and above the "critical" temperature for thermochromic switching (~68 °C). These data were then used in computations based on the Bruggeman effective medium theory applied to randomly oriented prolate spheroidal structural units to derive the optical properties of the deposits.Experimental and computed data on spectral absorptance were found to be in good qualitative agreement.

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Section: Introductionmentioning

confidence: 99%

Thermochromic VO2 nanorods made by sputter deposition: Growth conditions and optical modeling

Namura

Suzuki

et al. 2013

Journal of Applied Physics

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“…Smart radiation device (SRD), which can change its emittance in accordance with temperature, is a promising technology for spacecraft thermal control [1,2]. Bonded to the external surface of spacecraft, SRD can effectively controls the heat radiated to deep space without using electricity or any mechanical parts such as the thermal louver.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of VO2-based multilayer structure with variable emittance

Wang

Cao

Zhang

et al. 2015

Applied Surface Science

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“…Thermochromic materials exhibit a change in emissivity with surface temperature. For these materials, no electrical or mechanical actuation is required, however, the radiative surface properties are entirely dependent on the surface temperature making it difficult for use in thermal management [17]. Geometrical modifications have also been considered, including the incorporation of micro-column arrays to increase absorptive properties [18] and radiator plates with specialized fractal geometries to increase emissive properties [19].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Control of Radiative Surface Properties With Origami-Inspired Design

Mulford

Christensen

Jones

et al. 2014

Volume 8B: Heat Transfer and Thermal Engineering

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Thermal management systems for space equipment commonly use static solutions that do not adapt to environmental changes. Dynamic control of radiative surface properties is one way to respond to environmental changes and to increase the capabilities of spacecraft thermal management systems. This paper documents an investigation of the extent to which origamiinspired surfaces may be used to control the apparent absorptivity of a reflective material. Models relating the apparent absorptivity of a radiation shield to time-dependent surface temperatures are presented. Results show that the apparent absorptivity increases with increasing fold density and indicate that origami-inspired designs may be used to control the apparent radiative properties of surfaces in thermal management systems.

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Thermochromic VO2 film deposited on Al with tunable thermal emissivity for space applications

Cited by 165 publications

References 18 publications

Thermochromic VO2 nanorods made by sputter deposition: Growth conditions and optical modeling

Thermochromic VO2 nanorods made by sputter deposition: Growth conditions and optical modeling

Fabrication of VO2-based multilayer structure with variable emittance

Dynamic Control of Radiative Surface Properties With Origami-Inspired Design

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