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Zhang R, Song Z, Cao W, Gao G, Yang L, He Y, Han J, Zhang Z, Wang T, Zhu J. Multispectral smart window: Dynamic light modulation and electromagnetic microwave shielding. LIGHT, SCIENCE & APPLICATIONS 2024; 13:223. [PMID: 39209835 PMCID: PMC11362162 DOI: 10.1038/s41377-024-01541-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 06/15/2024] [Accepted: 07/17/2024] [Indexed: 09/04/2024]
Abstract
A novel multispectral smart window has been proposed, which features dynamic modulation of light transmittance and effective shielding against electromagnetic microwave radiation. This design integrates liquid crystal dynamic scattering and dye doping techniques, enabling the dual regulation of transmittance and scattering within a single-layer smart window. Additionally, the precise control of conductive film thickness ensures the attainment of robust microwave signal shielding. We present a theoretical model for ion movement in the presence of an alternating electric field, along with a novel approach to manipulate negative dielectric constant. The proposed model successfully enables a rapid transition between light transparent, absorbing and haze states, with an optimum drive frequency adjustable to approximately 300 Hz. Furthermore, the resistive design of the conductive layer effectively mitigates microwave radiation within the 2-18 GHz range. These findings offer an innovative perspective for future advancements in environmental construction.
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Affiliation(s)
- Ruicong Zhang
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, 450018, China
| | - Zicheng Song
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, China.
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, 450018, China.
| | - Wenxin Cao
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, 450018, China
| | - Gang Gao
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, 450018, China
| | - Lei Yang
- Research Center of Analysis and Measurement, Harbin Institute of Technology, Harbin, 150080, China
| | - Yurong He
- School of Energy Science & Engineering, Harbin Institute of Technology, Harbin, 150080, China
| | - Jiecai Han
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, China
| | - Zhibo Zhang
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, China.
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, 450018, China.
| | - Tianyu Wang
- School of Energy Science & Engineering, Harbin Institute of Technology, Harbin, 150080, China.
| | - Jiaqi Zhu
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, China.
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, 450018, China.
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Stable hazy states by electrohydrodynamic convection of ultraviolet-treated chiral nematic liquid crystal. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Gong Y, Li B, Yao CY, Yang W, Fan QH, Qiu Z, Li W. Tunable, Low-Cost, Multi-Channel, Broadband Liquid Crystal Shutter for Fluorescence Imaging in Widefield Microscopy. MICROMACHINES 2022; 13:1310. [PMID: 36014232 PMCID: PMC9415866 DOI: 10.3390/mi13081310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/07/2022] [Accepted: 08/11/2022] [Indexed: 06/15/2023]
Abstract
Bistable liquid crystal (LC) shutters have attracted much interest due to their low energy consumption and fast response time. In this paper, we demonstrate an electrically tunable/switchable biostable LC light shutter in biological optics through a three-step easy-assembly, inexpensive, multi-channel shutter. The liquid crystal exhibits tunable transparency (100% to 10% compared to the initial light intensity) under different voltages (0 V to 90 V), indicating its tunable potential. By using biomedical images, the response time, resolution, and light intensity changes of the LC under different voltages in three common fluorescence wavelengths are displayed intuitively. Particularly, the shutter's performance in tumor images under the near-infrared band shows its application potential in biomedical imaging fields.
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Affiliation(s)
- Yan Gong
- Electrical and Computer Engineering Department, Michigan State University, 428 S Shaw Ln, #2120, East Lansing, MI 48824, USA
| | - Bo Li
- Electrical and Computer Engineering Department, Michigan State University, 428 S Shaw Ln, #2120, East Lansing, MI 48824, USA
| | - Cheng-You Yao
- Biomedical Engineering Department, Michigan State University, 775 Woodlot Dr, East Lansing, MI 48824, USA
| | - Weiyang Yang
- Electrical and Computer Engineering Department, Michigan State University, 428 S Shaw Ln, #2120, East Lansing, MI 48824, USA
| | - Qi Hua Fan
- Electrical and Computer Engineering Department, Michigan State University, 428 S Shaw Ln, #2120, East Lansing, MI 48824, USA
- Chemical Engineering and Materials Science Department, Michigan State University, 428 S Shaw Ln, #2100, East Lansing, MI 48824, USA
| | - Zhen Qiu
- Biomedical Engineering Department, Michigan State University, 775 Woodlot Dr, East Lansing, MI 48824, USA
| | - Wen Li
- Electrical and Computer Engineering Department, Michigan State University, 428 S Shaw Ln, #2120, East Lansing, MI 48824, USA
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Ultrathin, transparent, thermally-insulated, and energy-efficient flexible window using coatable chiral-nematic liquid crystal polymer. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116804] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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