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3D Network Magnetophotonic Crystals Fabricated on Morpho Butterfly Wing Templates

机译：在Morpho蝴蝶翼模板上制作的3D网络磁光子晶体

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摘要

A simple synthesis method combining a sol-gel route followed by a reduction step is developed for the fabrication of magnetophotonic crystal (MPC) materials from Morpho butterfly wings. The sol-gel route leads to hematite with a photonic crystal structure (PC-α-Fe_2O_3) being faithfully replicated from a biotemplate, and the desired magnetophotonic crystal Fe_3O_4 (MPC-Fe_3O_4) is obtained by the reduction of the PC-α-Fe_2O_3 under a H_2/Ar atmosphere. The structural replication fidelity of the process is demonstrated on both the macro- and microscale, and even down to the nanoscale, as evidenced by scanning electron microscopy, X-ray diffraction, reflectance measurements, and transmission electron microscopy. It is found that the chemical transformation of PC-α-Fe_2O_3 to MPC-Fe_3O_4 changes only the dielectric constant and does not induce structural defects that could affect the photonic-crystal properties of the composite. The photonic band gap of MPC-Fe_3O_4 can be red-shifted with an increase of the external magnetic field strength, which is further supported by theoretical calculations. The reported biomimetic technique provides an effective approach to produce magnetophotonic crystals from nature with 30 networks, which may open up an avenue for the creation of new magneto-optical devices and theoretical research in this field.
机译：开发了一种简单的合成方法，该方法结合了溶胶-凝胶途径和还原步骤，从而可以从Morpho蝶形翼制造磁光子晶体（MPC）材料。溶胶-凝胶路径导致从生物模板忠实复制具有光子晶体结构（PC-α-Fe_2O_3）的赤铁矿，并且通过还原PC-α-Fe_2O_3获得所需的磁光子晶体Fe_3O_4（MPC-Fe_3O_4）。在H_2 / Ar气氛下。通过扫描电子显微镜，X射线衍射，反射率测量和透射电子显微镜证明，该方法的结构复制保真度在宏观和微观上均得到证实，甚至低至纳米级。发现从PC-α-Fe_2O_3到MPC-Fe_3O_4的化学转变仅改变介电常数，并且不会引起可能影响复合材料光子晶体性质的结构缺陷。 MPC-Fe_3O_4的光子带隙可以随着外部磁场强度的增加而红移，这在理论计算中得到了进一步支持。报道的仿生技术提供了一种有效的方法，可以从具有30个网络的自然界中生产磁光子晶体，这可能为创建新的磁光设备和该领域的理论研究开辟一条道路。

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  • 来源
    《Advanced Functional Materials》 |2012年第10期|p.2072-2080|共9页
  • 作者

    Wenhong Peng; Shenmin Zhu; Wanlin Wang; Wang Zhang; Jiajun Gu; Xiaobin Hu; Di Zhang; Zhixin Chen;

  • 作者单位

    State Key Lab of Metal Matrix Composite Shanghai jiao Tong University Shanghai, 200240, China;

    State Key Lab of Metal Matrix Composite Shanghai jiao Tong University Shanghai, 200240, China;

    State Key Lab of Metal Matrix Composite Shanghai jiao Tong University Shanghai, 200240, China;

    State Key Lab of Metal Matrix Composite Shanghai jiao Tong University Shanghai, 200240, China;

    State Key Lab of Metal Matrix Composite Shanghai jiao Tong University Shanghai, 200240, China;

    State Key Lab of Metal Matrix Composite Shanghai jiao Tong University Shanghai, 200240, China;

    State Key Lab of Metal Matrix Composite Shanghai jiao Tong University Shanghai, 200240, China;

    Engineering Materials Institute Faculty of Engineering University of Wollongong Wollongong, NSW2522, Australia;

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