V. William (Bill) Balthrop, 2002 President, National Communication Association

Balthrop, V. William

doi:10.1080/15358590600918821

Cited by 1 publication

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“…The existing securing methods usually have a physical cover, and/or indicator lights whose operation depends on manual action, are often neglected due to various reasons or even can be disabled covertly . There is a growing awareness and concern among users regarding camera privacy . Therefore, a failproof solution is highly desired that can automatically cover a camera when not in use.…”

Section: Resultsmentioning

confidence: 99%

Low-Voltage Haze Tuning with Cellulose-Network Liquid Crystal Gels

Ghosh,

Abraham,

Smalyukh

2023

ACS Nano

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Being key components of the building envelope, glazing products with tunable optical properties are in great demand because of their potential for boosting energy efficiency and privacy features while enabling the main function of allowing natural light indoors. However, windows and skylights with electric switching of haze and transparency are rare and often require high voltages or electric currents, as well as not fully meet the stringent technical requirements for glazing applications. Here, by introducing a predesigned gel material we describe an approach dubbed “Haze-Switch” that involves low-voltage tuning of the haze coefficient in a broad range of 2–90% while maintaining high visible-range optical transmittance. The approach is based on a nanocellulose fiber gel network infiltrated by a nematic liquid crystal, which can be switched between polydomain and monodomain spatial patterns of optical axis via a dielectric coupling between the nematic domains and the applied external electric field. By utilizing a nanocellulose network of nanofibers ∼10 nm in diameter we achieve <10 V dielectric switching and <2% haze in the clear state, as needed for applications in window products. We characterize physical properties relevant to window and smart glass technologies, like the color rendering index, haze coefficient, and switching times, demonstrating that our material and envisaged products can meet the stringent requirements of the glass industry, including applications such as privacy windows, skylights, sunroofs, and daylighting.

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Section: Resultsmentioning

confidence: 99%