Soft Matter
·
2022
·Vol. 18
·期 48
·9181-9196
·
IF 4.046
Xinyu Zhang,Liru Yao,Huixuan Yan,Yuhe Zhang,Dongxu Han,Yifan He,Chensha Li,Jianqi Zhang
We explore obtaining different photo responses of liquid crystalline elastomer (LCE) materials through modulating the optical wavelengths in order to promote the development of precise photocontrol on LCE actuators, and thus study the effect of light-absorbing dyes with different absorption bands on the selective actuation of LCE materials. The dye-doped LCEs were prepared by incorporating special visible absorber dyes into thiol-acrylate main chain LCE (MC-LCE) matrices. The dyes showed photo actuation performance to LCEs due to the photothermal effects. But, every dye-doped LCE could be effectively actuated by light irradiation whose wavelength was inside its absorption band, but could not be effectively actuated by the light whose wavelength was beyond its absorption band. Wavelength selective actuation effects, no matter actuating deformation or actuating force, could be remarkably demonstrated by these dye-doped LCEs through filtering the same quasi-daylight source to be different wavelength bands. Our work opens up a significant way for the precise and convenient photo actuation of LCE actuators, while expanding the utilization potential of quasi-daylight, and further natural sunlight.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Mengmeng Zhu,Ying Cao,Yuge Liang,Chao Ma,Hongbo Lu,Miao Xu,Longzhen Qiu,Jun Zhu
The transient planar (TP) state during the relaxation process, from homeotropic (H) to planar (P) state, of dye-doped cholesteric liquid crystals (DDCLCs) can be eliminated by adjusting the elastic constants, reducing the time and haze of the relaxation process. However, the elastic constants are easily influenced by temperature. Therefore, the operating temperature range for fast-relaxation DDCLCs is relatively narrow. This work demonstrates that a polymer helical template can be formed in the P state of DDCLCs by thiol-Michael addition polymerization . It can significantly expand the temperature range from 20 °C to 60 °C for fast-relaxation DDCLCs. More importantly, polymer-stabilized dye-doped cholesteric liquid crystals (PS-DDCLCs) did not show any reduction in the absorption of the dye or discoloration after polymerization. PS-DDCLCs could still achieve tri-state switching and could be used for fast-relaxation smart windows capable of adapting to increasing environmental temperatures. The proposed smart window can be used in vehicles and aircraft to prevent glare and protect privacy.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 33
·15714-15726
·
IF 3.5
Wu Jing,Li Jia,Huang Jinhua,Song Weijie,Tan Ruiqin
Heat management and color appearance are the key issues for the application of smart windows. Herein, a vibrant colored energy-saving polymer-dispersed liquid crystal (PDLC) film has been designed by combining dye-doping and the application of a heat shielding electrode. The LC droplet size could be varied by tuning the content of the dye. PDLC films featuring a low Disperse Orange 25 Azo dye concentration (0.06%) achieving an impressive contrast ratio of up to 101.5 with the transmittance reaching 79.17% at on state. Furthermore, indium tin oxide (ITO) and aluminum-doped zinc oxide (AZO) were chosen as the conductive layer materials, and the heat shielding properties of ITO and AZO/Ag/ITO (AAI) films were applied to PDLC devices and comparatively investigated. The AAI-based devices exhibited temperature reductions of 2 °C and 4 °C compared to the ITO-based devices at off and on states, respectively. This highlights the remarkable heat shielding performance and energy-saving capability of AAI-PDLC devices, as well as good flexibility and cycle stability. These AAI-based colored PDLC films exhibit substantial potential for smart window applications especially in buildings and automotive industry. Graphical Abstract
研究领域:
材料科学
·
能源技术
·
光学工程
✓ 已验证
DOI
高影响因子
LIQUID CRYSTALS
·
2020
·
IF 2.908
Li Zhang,Yawen Liu,Zhiqing Shi,Taoyu He,Xinjian Gong,Pengfei Geng,Zhenwei Gao,Yinghan Wang
Polymer-dispersed liquid crystal (PDLC) films containing a series of monomers with different alkyl chain lengths were prepared by nucleophile-initiated thiol-ene click reaction. The effect of alkyl chain length of monomers, dye and temperature on electro-optical properties of PDLC films was investigated. It was found that the alkyl chain length and polymerisation rate of monomers together determine the size of liquid crystal (LC) droplets, thus affecting the electro-optical properties of PDLC. In addition, the type and content of dyes could be optimised to obtain PDLC materials with better comprehensive properties for display.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
LIQUID CRYSTALS
·
2018
·
IF 2.636
Zhiqing Shi,Leishan Shao,Fei Wang,Feifei Deng,Yawei Liu,Yinghan Wang
Dye-doped polymer-dispersed liquid crystal (PDLC) is an attractive material for application in smart windows. We report a novel dye-doped PDLC system with low driving voltage (Vdr) fabricated by nucleophile-initiated thiol-ene click reaction for the first time. The Vdr decreased significantly with the addition of monofunctional monomer. The influences of reaction temperature on the electro-optical properties of PDLC are also investigated in this work.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 41
·34399-34405
·
IF 4.6
Qingwu Yao,Yuying Yang,Xuejun Cheng,Huai Lin,Xueyang Liu,Hongyu Chen
Doping dyes in silica has a wide range of applications, but there is currently no general method of synthesis. Here, we show that 98 cationic dyes of 11 series could be directly doped in silica nanoparticles of uniform size. In this co-precipitation method, the negatively charged silica precursor, poly(silicic acid), basically wraps the dyes as counter ions and preserves them.
研究领域:
纳米医学
·
生物材料
·
分子影像
·
药物递送
·
生物分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Fangyuan Gai,Ling Li,Yifan Yu,Zongyi Han,Lei Jin,Yuhui Ao,Yunling Liu,Qisheng Huo
This work demonstrated the design and synthesis of multiple dye-doped silica cross-linked micellar nanoparticles (MD-SCMNPs) by encapsulating three organic dyes (fluorescein derivative (FCD), coumarin derivative (HCE) and Rhodamine b (RhB)) in SCMNPs cores for colour-tuneable sensing of cysteine (Cys) in aqueous media and in living cells. In the presence of Cys, HCE exhibited blue emission, and RhB exhibited purple emission, while FCD reacted with Cys and exhibited green fluorescence “turn-on” in the core of MD-SCMNPs. This green-light-emitting sensing product may cause “step by step” fluorescent resonance energy transfer (FRET) from HCE to the sensing product and then to RhB. Based on the FRET process in the core, MD-SCMNPs can quantitatively detect Cys by a colour change with a low limit of detection (LOD) of 0.3 μM in living cells. Furthermore, MD-SCMNPs exhibited ultrasmall size (∼12 nm) and excellent dispersity and biocompatibility, which could potentially be used as a visualized Cys sensor for health monitoring and disease prediction in the human body.
研究领域:
生物化学
·
纳米医学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）