Windows of opportunity [smart windows for light/heat blocking]

Bains, Sunny

doi:10.1049/ir:20050404

Cited by 2 publications

(2 citation statements)

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“…Windows play a key role in modern building design, and often they take more than 80% of the area of the building facade. , Where the exterior of traditional buildings predominantly consist of traditional, nontransparent construction materials, new building designs come with a more open view to the outside world and windows merged into buildings as a luxury desire from humans enabling the entrance of daylight and a visual connection with the outside world . However, this comes with a price as the influx of light and heat and privacy is less controlled.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 Where the exterior of traditional buildings predominantly consist of traditional, nontransparent construction materials, new building designs come with a more open view to the outside world and windows merged into buildings as a luxury desire from humans enabling the entrance of daylight and a visual connection with the outside world. 3 However, this comes with a price as the influx of light and heat and privacy is less controlled. With the rapid advances in science and technologies, new functional/responsive devices are emerging in our society.…”

Section: ■ Introductionmentioning

confidence: 99%

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Cholesteric Flakes in Motion Driven by the Elastic Force from Nematic Liquid Crystals

Liu¹,

Zhou

Liu

et al. 2019

ACS Appl. Mater. Interfaces

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The paper presents a methodology to control the motion and orientation of suspended reflective cholesteric flakes in a nematic liquid crystal (LC) matrix. The flakes exhibit a dielectric anisotropy which controls their alignment with their in-plane axes parallel to an external electrical dc field. The elastic forces imposed by the LC host affect the switching behavior of the flakes and take care of the realignment to the planar state as soon as the dc field is switched off. When the LC host has a positive dielectric anisotropy, the switching voltage of the flakes is reduced by a factor of 2 in comparison with a LC host with negative dielectric anisotropy or in comparison with an isotropic host. We discovered that the LC host further regulates the back relaxation of cholesteric to return to the planar state upon retrieving the electric field. Whereas, in the isotropic fluid, flakes do not exhibit a preferred orientation when relaxed. Based on this newly proposed principle, we demonstrated its application as an optical switch for smart windows. Depending on the pitch of the cholesteric helix of the flakes, the light of a preset wavelength is reflected. Upon application of an electric field, the embedded flakes rotate their planes perpendicular to the substrate and consequently the incident light becomes fully transmitted without reflection or scattering of light.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Cholesteric Flakes in Motion Driven by the Elastic Force from Nematic Liquid Crystals

Liu¹,

Zhou

Liu

et al. 2019

ACS Appl. Mater. Interfaces

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Interactions Between Non‐Stoichiometric Stresses and Defect Transport in a Tubular Electrolyte

Swaminathan¹,

Qu²

2007

Fuel Cells

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It is well known that gadolinium doped ceria (10 GDC) undergoes significant compositional expansion when exposed to low oxygen partial pressures. When constrained, such expansion results in mechanical stresses in the ionic solid. Although significant work has been done in evaluating the magnitudes of this expansion, interactions between stresses induced as a result of chemical expansion and transport of point defects in a solid electrolyte have not received much attention. In this work, the formulation developed by Swaminathan et al. in ref. [1] for coupling transport and mechanical stresses in an ionic solid is used to numerically study the effects of transport–stress interaction in a tubular solid electrolyte made of 10 GDC. The results obtained in this study indicate a strong interaction between transport and stresses, showing a significant variation in the electrochemical performance of the electrolyte under varying conditions of stress–transport interaction. The solutions obtained in this study reduce to the well‐known results in the literature when chemical expansion is not considered, thereby partially validating our results.

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Windows of opportunity [smart windows for light/heat blocking]

Cited by 2 publications

References 0 publications

Cholesteric Flakes in Motion Driven by the Elastic Force from Nematic Liquid Crystals

Cholesteric Flakes in Motion Driven by the Elastic Force from Nematic Liquid Crystals

Interactions Between Non‐Stoichiometric Stresses and Defect Transport in a Tubular Electrolyte

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