Novel two-dimensional (2D) sandwich-shape composite film (SSCF) with multi-function was successfully prepared by adopting electrospinning technology. The SSCF is composed of three layers. The first layer is double aeolotropic conductive-green fluorescent layer composed of Janus nanoribbons array, the second layer is magnetic nanofibers non-array layer, the third layer is aeolotropic conductive-red fluorescent layer consisted of Janus nanoribbons array, and the three layers are closely bonded together to obtain the SSCF. By means of the distinctive sandwich-shape structure, the three layers show different functions separately. Because Janus nanoribbon special structure is the building unit for the first and third layers, the conductance ratios between two vertical directions of the first and third layers can reach 10⁸ time. Under the excitation of ultraviolet light, remarkable green emission at 545 nm and red emission at 615 nm can be obviously observed in the first and third layers, respectively. Moreover, owing to the unique sandwich shape, the properties of each layer are independent, and the fluorescence property of the first and third layers is almost unaffected by the variation of Fe₃O₄ NPs content of the second layer. The prepared 2D SSCF can be curled in four different ways to obtain totally new four kinds of 3D tri-wall tubes. The novel 3D tri-wall tubes possess the same outstanding performances as the 2D SSCF. The high integration of the peculiar 2D SSCF and 3D tri-wall tube with simultaneous tri-functionality is successfully actualized. More importantly, macrocosmic partition and microcosmic partition are concurrently used to construct SSCF and 3D tri-wall tube. Therefore, the novel manufacturing means can be popularized to assemble various three functions to realize multi-functionalization without mutual interferences among mono-function.

Graphic abstract

中文翻译：

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具有导电各向异性，磁性和荧光的三明治形复合膜及其衍生的3D三壁管

采用静电纺丝技术成功制备了新型的多功能二维（2D）夹心复合膜（SSCF）。SSCF由三层组成。第一层是由Janus纳米带阵列组成的双各向异性导电绿色荧光层，第二层是磁性纳米纤维非阵列层，第三层是由Janus纳米带阵列组成的各向异性导电红色荧光层，三层紧密结合绑定在一起以获得SSCF。通过独特的三明治形状结构，三层分别显示了不同的功能。由于Janus纳米带特殊结构是第一层和第三层的构建单元，因此第一层和第三层的两个垂直方向之间的电导比可以达到10 ⁸时间。在紫外光的激发下，在第一层和第三层中分别可以明显观察到545 nm处显着的绿色发射和615 nm处的红色发射。而且，由于独特的夹心形状，各层的性质是独立的，并且第一层和第三层的荧光性质几乎不受Fe ₃ O ₄的变化的影响。第二层的NPs含量。可以用四种不同的方式卷曲准备好的2D SSCF，以获得全新的四种3D三壁管。新颖的3D三壁管具有与2D SSCF相同的出色性能。成功实现了奇特的2D SSCF和3D三壁管同时具有三功能的高度集成。更重要的是，宏观分隔和微观分隔同时用于构造SSCF和3D三壁管。因此，可以推广新颖的制造装置以组装各种三种功能以实现多功能化而不会在单功能之间相互干扰。

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