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谈亚丽、马会茹等撰写的论文被Journal of Materials Chemistry C 接收

发布时间:2018-03-26
     谈亚丽硕士生、马会茹副教授等撰写的论文Eccentric 1-D Magnetic Core-Shell Photonic Crystal Balls with Self-displaying Structural Colors and Multiple ResponsivenessC8TC00640G被英国皇家化学会期刊Journal of Materials Chemistry C (工程技术一区,影响因子:5.256)接收。在该论文中,我们发展了一种灵活的光强指导形貌可控聚合方法,并用它制备处理一种具有自取向显色和对外磁场方向和强度均敏感的偏心核壳一维光子晶体球。在这种形貌可控聚合方法中,我们在光源对面巧妙地使用了一基底反光层物质,从而使外磁场下形成的光子晶体液滴表面的光场少于内部,且在内部呈现出非对称分布。利用该特性,我们采用动态可控聚合,调整光聚合时间即可以制备出偏向结构的液核-凝胶壳光子晶体。这样制备的光子晶体球由于质心和几何中心不重合能赋予其自取向显色特性。利用其凝胶壳中光子晶体结构的各向异性可以赋予其对外磁场方向的响应特性;同时,利用内核中形成的磁响应光子晶体液体可以对外磁场大小产生快速的变色响应。这样获得的多场响应性光子晶体球能同时表现出两个光子带隙,在仿生结构材料、节能显示、信号调制和防伪涂层中可望有应用潜力。

     原文摘要如下:This paper demonstrates eccentric one-dimensional (1-D) core-shell photonic crystal balls (PCBs) with self-displaying structural colours and responsiveness to both the direction and strength of external magnetic field (H), as well as their controllable and versatile light intensity-guiding morphology-controllable polymerization method. In this protocol, the irradiation of a unidirectional UV light upon photopolymerizable magnetically responsive photonic crystal (MRPC) droplet templates in a vessel with reflected bottom substrate enables the light intensity within the droplets to decrease from the outer to inside in a noncentrosymmetrical manner, generating PCBs with an MRPC liquid core eccentrically encapsulated in a 1-D PC hydrogel shell under H by controlling the light irradiation time. Besides the magnetic rotation, the resultant PCBs are capable of collectively self-displaying structural colour without input energy due to the inner-eccentric 1-D PC hydrogel shells. Furthermore, they can display dynamically tunable bi-photonic band-gaps by H benefiting from the coexistence of the PC hydrogel shell and MRPC liquid core. When dispersed in viscous media suppressing the magnetic rotation, they may also exhibit orthogonal bi-photonic band-gaps, enabling a wide-angle display character of 1-D photonic crystals with different colour patterns. These unique modulations in optical properties promise important applications of the as-developed PCBs in bionic chromatic materials, energy-saving display, switchable signage and anti-counterfeiting coating.

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