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孔磊、牟方志和马会茹等撰写的论文被Adv. Funct. Mater.正式接收发表

发布时间:2020-09-14
  在此热烈祝贺孔磊、牟方志和马会茹等撰写的研究论文Self-Adaptive Magnetic Photonic Nanochain Cilia Arrays被材料学科著名期刊Advanced Functional Materials接收(DOI: 10.1002/adfm.202005243)。多功能人工纤毛的发展可能会激发新一代智能仿生微器件和微流控系统,但目前仍是一个巨大的挑战。在该论文中,我们演示了一种自适应磁性光子纳米纤毛阵列(SMPNCAs),它能够实现实时和原位可视化检测微环境和自适应流体泵浦。该SMPNCAs由磁性纳米粒子有序形成的单根一维周期结构封装在pH响应的水凝胶壳中组成。结合磁性组装和UV辅助氢键诱导模板聚合方法,它可以在具有定义图案的玻璃衬底上用一步打印的方法制备得到。当被泵浦流体的pH值改变时,这样打印的SMPNCAs中的响应水凝胶壳层能发生可逆的体积变化,从而能表现出实时可调的粒子间距离(晶格常数)和总长度。因此,它们可以通过原位显示不同的衍射颜色,实时感知周围环境的pH变化;并在旋转磁场下以自适应的流速定向泵浦流体(比如流体pH值降低,泵浦速率变慢)。 得益于它简单、稳健的打印制造方法、可视化的快速传感和自适应流体泵浦的集成,我们开发的SMPNCAS有望显著推动生物模拟和微流控系统方面的重大进展。

    原文详细摘要如下:The development of multifunctional artificial cilia may inspire a new generation of intelligent biomimetic microdevices and microfluidic systems, but remains a great challenge nowadays. Here we show self-adaptive magnetic photonic nanochain cilia arrays (SMPNCAs) capable of achieving real-time and in-situ visual microenvironment detection and self-adaptive fluid pumping. By combining magnetic assembly and UV-assisted hydrogen bond-guided template polymerization in printing, SMPNCAs consisting of individual one-dimensional periodic structure of magnetic nanoparticles encapsulated in pH-responsive hydrogel shells, as an example, are demonstrated to be printed on a glass substrate with defined patterns in one step. The as-printed SMPNCAs exhibit real-time adjustable interparticle distance (lattice constant) and total length in response of the reversible volume change of the hydrogel shell with the pH value of the pumped fluids. Consequently, they can sense the surrounding pH variation in real time by in-situ displaying different diffracted color, and pump directional flows with self-adaptive flow velocity under a rotating magnetic field. Benefited from the integration of the facile, robust printing fabrication, structure-color-based fast sensing and self-adaptive fluid pumping, the SMPNCAs developed here promise a significant advance in biomimicry and microfluidic systems.


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