Bioinspired Simultaneous Changes in Fluorescence Color, Brightness, and Shape of Hydrogels Enabled by AIEgens

被引：237

作者：

Li, Zhao ^{[1
,2
,3
]}

Liu, Pengchao ^{[4
]}

Ji, Xiaofan ^{[1
,2
,3
]}

Gong, Junyi ^{[1
,2
,3
]}

Hu, Yubing ^{[1
,2
,3
]}

Wu, Wenjie ^{[1
,2
,3
]}

Wang, Xinnan ^{[1
,2
,3
]}

Peng, Hui-Qing ^{[1
,2
,3
]}

Kwok, Ryan T. K. ^{[1
,2
,3
]}

Lam, Jacky W. Y. ^{[1
,2
,3
]}

Lu, Jian ^{[4
,5
]}

Tang, Ben Zhong ^{[1
,2
,3
,6
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Chem, Hong Kong Branch,Kowloon, Chinese Natl Engn Res Ctr Tissue Restorat & Recon, Clear Water Bay, Hong Kong, Peoples R China

[2] Hong Kong Univ Sci & Technol, Inst Adv Study, Kowloon, Clear Water Bay, Hong Kong, Peoples R China

[3] HKUST Shenzhen Res Inst, 9 Yuexing 1st RD,South Area,Hitech Pk Nanshan, Shenzhen 518057, Peoples R China

[4] City Univ Hong Kong, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

[5] City Univ Hong Kong, Ctr Adv Struct Mat, Shenzhen Res Inst, 8 Yuexing 1st Rd,Shenzhen Hitech Ind Pk, Shenzhen 518057, Peoples R China

[6] South China Univ Technol, State Key Lab Luminescent Mat & Devices, SCUT HKUST Joint Res Inst, Ctr Aggregat Induced Emiss, Guangzhou 510640, Peoples R China

来源：

ADVANCED MATERIALS | 2020年 / 32卷 / 11期

基金：

美国国家科学基金会;

关键词：

aggregation-induced emission luminogens; complex shape; fluorescence; simultaneous changes; stimuli-responsive hydrogels; AGGREGATION-INDUCED EMISSION; FUNCTIONALIZATION; BILAYER;

D O I：

10.1002/adma.201906493

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Development of stimuli-responsive materials with complex practical functions is significant for achieving bioinspired artificial intelligence. It is challenging to fabricate stimuli-responsive hydrogels showing simultaneous changes in fluorescence color, brightness, and shape in response to a single stimulus. Herein, a bilayer hydrogel strategy is designed by utilizing an aggregation-induced emission luminogen, tetra-(4-pyridylphenyl)ethylene (TPE-4Py), to fabricate hydrogels with the above capabilities. Bilayer hydrogel actuators with the ionomer of poly(acrylamide-r-sodium 4-styrenesulfonate) (PAS) as a matrix of both active and passive layers and TPE-4Py as the core function element in the active layer are prepared. At acidic pH, the protonation of TPE-4Py leads to fluorescence color and brightness changes of the actuators and the electrostatic interactions between the protonated TPE-4Py and benzenesulfonate groups of the PAS chains in the active layer cause the actuators to deform. The proposed TPE-4Py/PAS-based bilayer hydrogel actuators with such responsiveness to stimulus provide insights in the design of intelligent systems and are highly attractive material candidates in the fields of 3D/4D printing, soft robots, and smart wearable devices.

引用

页数：10

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