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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Author(s)

  • Zhao Li
  • Pengchao Liu
  • Xiaofan Ji
  • Junyi Gong
  • Yubing Hu
  • Wenjie Wu
  • Xinnan Wang
  • Hui-Qing Peng
  • Ryan T. K. Kwok
  • Jacky W. Y. Lam
  • Ben Zhong Tang

Detail(s)

Original languageEnglish
Article number1906493
Journal / PublicationAdvanced Materials
Volume32
Issue number11
Online published5 Feb 2020
Publication statusPublished - 19 Mar 2020

Abstract

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.

Research Area(s)

  • aggregation-induced emission luminogens, complex shape, fluorescence, simultaneous changes, stimuli-responsive hydrogels

Citation Format(s)

Bioinspired Simultaneous Changes in Fluorescence Color, Brightness, and Shape of Hydrogels Enabled by AIEgens. / Li, Zhao; Liu, Pengchao; Ji, Xiaofan; Gong, Junyi; Hu, Yubing; Wu, Wenjie; Wang, Xinnan; Peng, Hui-Qing; Kwok, Ryan T. K.; Lam, Jacky W. Y.; Lu, Jian; Tang, Ben Zhong.

In: Advanced Materials, Vol. 32, No. 11, 1906493, 19.03.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal