Assembling 1D and Janus Nanobelts into 2D Aeolotropic Conductive Janus Membranes and 3D Double‐Walled Janus Tubes

Abstract Two‐dimensional (2D) stratified Janus membranes (denoted as SJM) with double aeolotropic electrical conduction and simultaneous magnetism and fluorescence have been designed and constructed via electrospinning by using one‐dimensional (1D) nanobelts and Janus nanobelts as building blocks. The SJM is composed of two layers tightly bonded together. The top layer is a left‐right structured Janus membrane, the left part and right part possess aeolotropic electrical conduction, and the conductive directions are vertical, leading to double aeolotropic conduction. Moreover, red and green fluorescence in the two parts occurs under UV irradiation. The bottom layer is a non‐array magnetic membrane. By rolling the 2D SJM into a tube, either from left to right or top to bottom, three‐dimensional (3D) double‐walled Janus tubes with the Janus tube and the isotropic tube on the exterior and interior of the tube are obtained. The novel 3D double‐walled Janus tubes exhibit the same excellent performance as the 2D SJM. Thus, the structural transition from 1D nanobelts and Janus nanobelts utilized as building units to 2D double aeolotropic conductive Janus membrane then to 3D Janus tube is successfully realized.