Self-regulating electrical rhythms with liquid crystal oligomer networks in hybrid circuitry

Astam, Mert O; Lyu, Pengrong; Peixoto, Jacques; Liu, Danqing

doi:10.1039/d2sm01117d

Cited by 5 publications

(2 citation statements)

References 36 publications

(39 reference statements)

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“…As claimed earlier, the spatial distribution of the molecular order is crucial to achieving the desired application. Over time, multiple techniques have been developed such as rubbing surfaces [9] , photoalignment methods [10] , mechanical forces [11] , and the use of surfactants [12] . In the LC field, we define the director n to be the alignment along the long molecular axes.…”

Section: Introductionmentioning

confidence: 99%

Thermal actuation of topological soliton embedded into liquid crystal coating

Peixoto,

Hall,

Broer

et al. 2024

Liquid Crystals Optics and Photonic Devices

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Liquid crystal network has been in scope to obtain responsive material. Inspired by biomimicry, a large scale of applications based on tunability of surface properties are developed. Different stimuli such as temperature, light, electric field, and chemical environment have been used. The response and modulation are featured by the director field of the material which is kept by the photopolymerization process. The spatial distribution of the director n represents the long axes of our nematic liquid crystal, and it can be controlled using different techniques. Our method generates topological defects before photopolymerization as a template to induce tunable surface topographic patterns. The richness of the different structures allows us to create a library of surface morphology. Here we present the modulation of different pseudo objects, as torons, twistions, cholesteric fingers of different natures and looped onto themselves. Those structures exhibit exotic modulation upon thermal deformation with an amplitude reaching up to 40% of the initial thickness.

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Section: Introductionmentioning

confidence: 99%

Thermal actuation of topological soliton embedded into liquid crystal coating

Peixoto,

Hall,

Broer

et al. 2024

Liquid Crystals Optics and Photonic Devices

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“…Contrarily, liquid crystal elastomeric polymer networks (LCEs) are emerging materials currently in development possessing application-specific characteristics, such as artificial muscles for soft robotics. 9–29 Molecularly aligned LCEs exhibit anisotropic macroscopic deformation typically in response to heat by programming molecular alignment. 30–32 By temperature change, the LCEs undergo order-to-disorder transformation due to nematic–isotropic phase transition and, as a result, contraction along the molecular director takes place.…”

Section: Introductionmentioning

confidence: 99%

A cold-responsive liquid crystal elastomer provides visual signals for monitoring a critical temperature decrease

Zhan

Broer

et al. 2023

Mater. Horiz.

Self Cite

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Localized and Limited‐Dispersive Delivery of Thermal Stimuli to Liquid Crystal Oligomer Networks Through Radio‐Frequency Media

Astam,

Verheesen,

Lyu

et al. 2024

Adv Funct Materials

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Wireless energy transmission (WET) promises to enhance device mobility through selective and untethered energy delivery. In this paper, WET principles are harnessed to directly and non‐dispersively transfer thermal stimuli to designated areas within thermally‐responsive liquid crystal oligomer networks (LCONs). For this, a conductive coil receiver within the LCON as a remote stimuli source is embedded. Upon activation by radio‐frequency WET, targeted Joule heating occurs and the low thermal conductivity of LCONs causes retention of delivered stimulus at the receiver, generating temperature differences of up to 45 °C within the host LCON. This enables localized LCON actuation and self‐regulated oscillations with a natural frequency of ≈0.027 Hz. WET selectivity is further demonstrated within self‐pressing buttons for keyboards, where actuation only in designated areas is required for operation. The work is envisioned to contribute toward remote material‐based logic for hybrid circuit designs for medical, soft robotic, and haptic applications.

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Self-regulating electrical rhythms with liquid crystal oligomer networks in hybrid circuitry

Abstract: Self-regulation is an essential aspect in the practicality of electronic systems, ranging from household heaters to robots for industrial manufacturing. In such devices, self-regulation is conventionally achieved through separate sensors...

Cited by 5 publications

References 36 publications

Thermal actuation of topological soliton embedded into liquid crystal coating

Thermal actuation of topological soliton embedded into liquid crystal coating

A cold-responsive liquid crystal elastomer provides visual signals for monitoring a critical temperature decrease

Localized and Limited‐Dispersive Delivery of Thermal Stimuli to Liquid Crystal Oligomer Networks Through Radio‐Frequency Media

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