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Updated: Aug 13, 2025

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
Published on: October 31, 2019
Flows in parallelepiped cells of nematic liquid crystals
Ervanggis Minggar Kusumasari1, Suharli Aj1, Bhisma Mahendra2
1Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia.
Abstract:
We identified three types of flow in a nematic liquid crystal parallelepiped cell subjected to an ac electric field at low frequency. Our observations show the existence of translational flow, backflow, and convection flow in parallelepiped cells. We measured the backflow velocity by introducing microparticles into the sample. The backflow velocity at the normalized voltage ɛ=0.05 is approximately 0.1μm/s. It has the same order as the translational flow velocity at ɛ=0.05. Furthermore, convection flow occurs earlier than translational flow.
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