scholarly journals Dielectric Thermal Smart Glass Based on Tunable Helical Polymer-Based Superstructure for Biosensor with Antibacterial Property

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 245
Author(s):  
Haw-Ming Huang ◽  
Fu-Lun Chen ◽  
Ping-Yuan Lin ◽  
Yu-Cheng Hsiao
Keyword(s):  
Liquid Crystals ◽  
Antibacterial Property ◽  
Photonic Devices ◽  
Industrial Applications ◽  
Infrared Light ◽  
Dielectric Heating ◽  
Dual Frequency ◽  
Biomolecule Detection ◽  
Helical Polymer ◽  
Biosensor Applications

A dielectric thermal smart glass (DTSG) based on the dielectric heating optical (DHO) effect in tunable helical polymer-based superstructures—cholesteric liquid crystals (CLCs)—was exhibited in this study. Field-induced dielectric heating can strongly affect the orientation of liquid crystals and change its optical properties. The purpose of this research focuses on dual-frequency CLC materials characterized by their specific properties on dielectric relaxation and demonstrates their potential for antibacterial biosensor applications. The developed DTSG is driven by voltages with modulated frequencies. The principal of DTSG in transparent states are a planar (P) state and a heated planar (HP) state reflecting infrared light, operated with the voltage at low and high frequencies, respectively. The scattering states are a focal conic (FC) state and a heated FC (HFC) state, with an applied frequency near the crossover frequency. The biomolecule detection of the antibacterial property was also demonstrated. The detection limitation of the DTSG biosensor was found to be about 0.5 µg/mL. The DTSG material has many potential industrial applications, such as in buildings, photonic devices, and biosensor applications.

Dielectric heating effects of dual-frequency liquid crystals

2005 ◽  
Vol 86 (23) ◽  
pp. 231104 ◽  
Author(s):  
Chien-Hui Wen ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystals ◽  
Dielectric Heating ◽  
Dual Frequency ◽  
Heating Effects

Polymer Stabilized Bistable Dual Frequency Cholesteric Liquid Crystal Devices Assisted by a Predesigned Chiral Dopant

2021 ◽  
Author(s):  
Chun-Yen Liu ◽  
Chi-Feng Yen ◽  
Yi-Hua Hung ◽  
Chia-Ming Tu ◽  
Guan-Yi Wu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Cholesteric Liquid Crystal ◽  
Photonic Devices ◽  
Smart Devices ◽  
Dual Frequency ◽  
External Stimulation ◽  
Liquid Crystal Devices ◽  
Polymer Stabilized

Liquid crystals have great potential for developing photonic devices that control the optical behaviors of liquid crystals in smart devices with external stimulation. In this study, we demonstrated a series...

On the dielectric heating of dual-frequency liquid crystals

2005 ◽  
Author(s):  
Chien-Hui Wen ◽  
Benjamin Wu ◽  
Haiying Wang ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystals ◽  
Dielectric Heating ◽  
Dual Frequency

Order parameter of dual-frequency nematic liquid crystals measured over a wide range of thicknesses

2020 ◽  
Vol 47 (9) ◽  
pp. 1338-1344
Author(s):  
Olha Melnyk ◽  
Yuriy Garbovskiy ◽  
Anatoliy Glushchenko
Keyword(s):  
Liquid Crystals ◽  
Order Parameter ◽  
Nematic Liquid Crystals ◽  
Dual Frequency ◽  
Wide Range

Frequency-addressed tunable transmission in optically thin metallic nanohole arrays with dual-frequency liquid crystals

2011 ◽  
Vol 109 (8) ◽  
pp. 084340 ◽  
Author(s):  
Qingzhen Hao ◽  
Yanhui Zhao ◽  
Bala Krishna Juluri ◽  
Brian Kiraly ◽  
Justin Liou ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Dual Frequency ◽  
Nanohole Arrays

scholarly journals System-Level Model and Simulation of a Frequency-Tunable Vibration Energy Harvester

Micromachines ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 91 ◽  
Author(s):  
Sofiane Bouhedma ◽  
Yongchen Rao ◽  
Arwed Schütz ◽  
Chengdong Yuan ◽  
Siyang Hu ◽  
...  
Keyword(s):  
Energy Harvester ◽  
Element Model ◽  
Industrial Applications ◽  
System Level ◽  
Dual Frequency ◽  
Frequency Range ◽  
Vibration Energy Harvester ◽  
Resonance Frequencies ◽  
Level Model ◽  
System Level Model

In this paper, we present a macroscale multiresonant vibration-based energy harvester. The device features frequency tunability through magnetostatic actuation on the resonator. The magnetic tuning scheme uses external magnets on linear stages. The system-level model demonstrates autonomous adaptation of resonance frequency to the dominant ambient frequencies. The harvester is designed such that its two fundamental modes appear in the range of (50,100) Hz which is a typical frequency range for vibrations found in industrial applications. The dual-frequency characteristics of the proposed design together with the frequency agility result in an increased operative harvesting frequency range. In order to allow a time-efficient simulation of the model, a reduced order model has been derived from a finite element model. A tuning control algorithm based on maximum-voltage tracking has been implemented in the model. The device was characterized experimentally to deliver a power output of 500 µW at an excitation level of 0.5 g at the respected frequencies of 63.3 and 76.4 Hz. In a design optimization effort, an improved geometry has been derived. It yields more close resonance frequencies and optimized performance.

High birefringence phenyl tolane positive compounds for dual frequency liquid crystals

2009 ◽  
Vol 36 (12) ◽  
pp. 1401-1408 ◽  
Author(s):  
Jie Sun ◽  
Haiqing Xianyu ◽  
Sebastian Gauza ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystals ◽  
Dual Frequency ◽  
High Birefringence

scholarly journals Electrically tuned whispering gallery modes microresonator based on microstructured optical fibers infiltrated with dual-frequency liquid crystals

Nanophotonics ◽  
2018 ◽  
Vol 7 (7) ◽  
pp. 1333-1340 ◽  
Author(s):  
Chengkun Yang ◽  
Hao Zhang ◽  
Bo Liu ◽  
Haifeng Liu ◽  
Chao Wang ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Optical Fibers ◽  
Applied Electric Field ◽  
Optical Switching ◽  
Resonance Wavelength ◽  
Crossover Frequency ◽  
Dual Frequency ◽  
Whispering Gallery ◽  
Operation Frequency

AbstractAn electrically tunable whispering gallery mode (WGM) microresonator based on an HF-etched microstructured optical fiber (MOF) infiltrated with dual-frequency liquid crystals (DFLCs) is proposed and experimentally demonstrated for the investigation of the crossover frequency and Freedericksz transition of DFLCs. Experimental results indicate that for applied electric field with operation frequency below the crossover frequency, WGM resonance wavelength decreases with the increment of applied electric field strength. On the contrary, for applied electric field with operation frequency beyond the crossover frequency, WGM resonance dips show red shift as the applied electric field intensity increases. The proposed electrically tunable microcavity integrated with DFLCs is anticipated to find potential applications in optical filtering, all-optical switching, and electrically manipulated bi-directional micro-optics devices.

Effects of Dielectric Relaxation on the Dynamics and Dielectric Heating of Nematic Liquid Crystals

2008 ◽  
Vol 480 (1) ◽  
pp. 111-128
Author(s):  
Sergij V. Shiyanovskii ◽  
Andrii B. Golovin ◽  
Ye Yin ◽  
Oleg D. Lavrentovich
Keyword(s):  
Liquid Crystals ◽  
Dielectric Relaxation ◽  
Nematic Liquid Crystals ◽  
Dielectric Heating
Sign in / Sign up

Export Citation Format

Share Document