Advanced Optical Materials
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2025
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IF 7.2
Junheng Gao,Fu Tang,Yuting Li,Likang Zhang,An Hu,Shuo Li,Lidong Li
Fluorescent hydrogels have immense potential and are widely studied for on demand displays. Response rate of fluorophores upon stimuli within the hydrogel matrix is a key role to improve the timely responsiveness, but rare reports are elaborated on it. In this work, the photoisomeric spiropyran methacrylate (SPMA) is introduced into the poly (2-hydroxyethyl methacrylate) hydrogel to fabricate a stimuli-responsive fluorescent hydrogel. Interestingly, the photoresponse rate of SPMA in the hydrogel is greatly accelerated at the presence of F127 micelles than without it. Both of the absorbance and fluorescence intensity of the hydrogels at the photostationary state are improved obviously with micelles. Besides, the normalized absorbance and the fluorescence kinetic studies indicated a more than 2 times quicker isomerization process. The absolute fluorescence quantum yields of SPMA in the hydrogel is also increased. These can be attributed to the hydrophobic microenvironment provided by the F127 micelles that facilitated the conformation transition of SPMA. Thus, the synergetic effect of the increased amount of activable SPMA and the promoted speed of isomerization contributed to the accelerated photoresponse of the prepared hydrogel. Taking advantage of these virtues, a timely and multi-responsive on-demand information encryption system is realized.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Xuyang Zhou,Xiaoqing Liu,Xiaoxiao Yu,Qin Liu,Tianxiang Bai,Mengyue Gao,Chengjian Xu,Xinhai Zhang,Meifang Zhu,Yanhua Cheng
The development of optical humidity detection has been of considerable interest in highly integrated wearable electronics and packaged equipment. However, improving their capacities for color recognition at ultralow humidity and response–recovery rate remains a significant challenge. Herein, we propose a type of hybrid water-harvesting channel to construct brand-new passive fluorescence humidity sensors (PFHSs). Specifically, the hybrid water-harvesting channels involve porous metal–organic frameworks and a hydrophilic poly(acrylic acid) network that can capture water vapors from the ambient environment even at ultralow humidity, into which polar-responsive aggregation-induced emission molecules are doped to impart humidity-sensitive luminescence colors. As a result, the PFHSs exhibit clearly defined fluorescence signals within 0–98% RH coupling with desirable performances such as a fast response rate, precise quantitative feedback, and durable reversibility. Given the flexible processability of this system, we further upgrade the porous structure via electrostatic spinning to furnish a kind of Nano-PFHSs, demonstrating an impressive response time (<100 ms). Finally, we validate the promising applications of these sensors in electronic humidity monitoring and successfully fabricate a portable and rapid humidity indicator card.
研究领域:
材料科学
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光学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Yingxin Ji,Keyi Wang,Ruixue Zhang,Gang Zhao
Biomimetic artificial muscles (BMAMs), owing to their flexibility, deformability, and high controllability, hold great promise for applications in underwater robotics, wearable devices, and intelligent bionic systems. However, conventional fabrication processes rely on synthetic polymers, which pose challenges such as environmental pollution and limited biocompatibility. To simultaneously promote the sustainable exploitation of marine resources and ensure environmental sustainability, this study employs natural sodium alginate as the primary raw material for the fabrication of BMAMs. By incorporating materials with enhanced electrical properties through doping techniques, the performance of the actuators is improved. Furthermore, a gel-linked cold-pressing assembly method based on a preformed actuating membrane solution is proposed to optimize the interfacial bonding quality between the electrode membrane and the electroactive membrane. The composite electrode membranes were systematically characterized using FIB-SEM and CV, and their mechanical performance was evaluated through force output tests. Experimental results demonstrate that the gel-linked cold-pressing technique significantly improves the output force, force density, and response rate of the BMAM, with maximum enhancements of 189.56%, 175.07%, and 160.11%, respectively. Additionally, a multidimensional evaluation system based on maximum output force, force density, and response rate was established to comprehensively assess the mechanical performance of the BMAM under various working conditions.
研究领域:
材料科学
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生物医学工程
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高分子科学
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机器人学
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机械工程
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Mingxiao Wu,Ziliang Wang,Baoluo Zhao,Peng Chen,Dongmei Li,Zhongzhen Tian
Four π-extended viologen derivatives (Spr-PO/Sbu-PO/OHpr-PO/ OHet-PO) were synthesized by introducing oxadiazole group and side chain modification. Compared with viologen with bipyridines as the chromophore, these POs possessed extended conjugation lengths and optimized photoelectron conversion efficiency. The CMC gel electrochromic devices based on them could realize the color transformation from colorless to yellow-green under the working voltage of 1.1 V. Furthermore, due to different side chain groups, the diffusion rates of POs in the gel changed significantly. Compounds based on hydroxyl side chain groups showed higher response rates (<10 s) in the CMC gel system, while sulfonate side chain modified POs showed slower response characteristics (>10 s). All POs showed excellent stability, the optical contrasts were almost unchanged after continuous working for 100 cycles. This study provided an important method for obtaining efficient and stable electrochromic devices.
研究领域:
材料科学
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电化学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
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