中国科学院宁波材料技术与工程研究所T陈涛团队开发出了干扰触发的即时结晶激活生物激发发光凝胶。相关研究成果于2025年1月22日发表于国际一流学术期刊《德国应用化学》。

许多海洋生物具有灵敏的感官感知系统，可以感知周围环境，并对强烈的生物发光干扰做出反应。尽管这种材料对视觉传感和智能显示器很有吸引力，然而，开发能够感知外部干扰并同时激活强烈发光的人造材料仍然是一个巨大的挑战。

该文中，研究人员通过整合亲水性聚合物网络、亚稳态过饱和盐和含有异质原子的荧光团构建一类新的仿生智能凝胶。在外部干扰下，复合凝胶会经历瞬间可逆的软刚性态转变，同时开启强烈的荧光并激活超长余辉发射，最大寿命为877.15毫秒。实验结果和分子动力学模拟表明，干扰诱导的发光主要是由于聚集的荧光团的几何限制和增强的分子相互作用，从而大大抑制了非辐射耗散。鉴于其多功能和灵敏的干扰响应能力，演示了动态交互式绘画和3D智能光学显示器。

该研究为实现干扰传感软材料开辟了新的途径，促进了智能视觉传感器和交互式光学显示器的发展。

附：英文原文

Title: Disturbance-Triggered Instant Crystallization Activating Bioinspired Emissive Gels

Author: Min Qi, Jianxiang Huang, Junjie Wei, Jiayin Zhou, Depeng Liu, Longqiang Li, Wuzhen Luo, Guangqiang Yin, Tao Chen

Issue&Volume: 2025-01-22

Abstract: Many marine organisms feature sensitive sensory-perceptual systems to sense the surrounding environment and respond to disturbance with intense bioluminescence. However, it remains a great challenge to develop artificial materials that can sense external disturbance and simultaneously activate intense luminescence, although such materials are attractive for visual sensing and intelligent displays. Herein, we present a new class of bioinspired smart gels constructed by integrating hydrophilic polymeric networks, metastable supersaturated salt and fluorophores containing heterogenic atoms. Upon external disturbance, the composite gels undergo an instant and reversible soft-rigid state transition, simultaneously turning on intense fluorescence and activating ultralong afterglow emission with a maximum lifetime of 877.15 ms. The experimental results and molecular dynamics simulations reveal that the disturbance-induced luminescence mainly results from the geometrical confinement of aggregated fluorophores and enhanced molecular interactions to immensely suppress the non-radiative dissipation. Given their versatile and sensitive disturbance-responsiveness, dynamic interactive painting and 3D smart optical displays are demonstrated. This study paves a new avenue to achieve disturbance-sensing soft materials and promotes the development of smart visual sensors and interactive optical displays.

DOI: 10.1002/anie.202501054

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202501054