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.

Single Step Assembly of Janus Porous Biomaterial by Sub‐Ambient Temperature Electrodeposition

“…Advanced "Janus" interface materials refer to materials with asymmetric chemistry, morphology, and properties on each morphological structures and sometimes these structural differences are also accompanied by differences in chemical compositions on each face. For instance, additive methods include direct/sequential additive assembly of materials with different porous characteristics by using sequential filtration, [24,25] electrospinning, [26][27][28] heterogeneous-polymerization, [17,29,30] asymmetric surface coating (e.g., atomic layer deposition, ALD), [31,32] heterogeneously freeze-drying [33,34] or electrodeposition. [22,35] In addition, subtractive methods mainly refer to non-homogeneous pore etching.…”

“…Electrofabrication is an emerging fabrication approach that uses imposed electrical signals (generally <5 V) to guide the assembly of thin films at (or near) an electrode surface. [24,27,[39][40][41] Recently, electrofabrication (i.e., electrodepostion) has shown considerable capabilities for the precise structural control of porous metal architectures (i.e., pore size, surface area, pore structure, etc.) to meet specific requirements for various advanced applications.…”

Electrospun Janus-like pellicle displays coinstantaneous tri-function of aeolotropic conduction, magnetism and luminescence

“…13h-j. These results are attributed to the fact that brown Fe 3 O 4 NPs can absorb part of excited and emitted lights and the absorption is more obvious with the increase of Fe 3 O 4 NPs, 40,51 leading to the reduction of luminescence intensity. The characteristic emission peaks of Eu 3+ are not found from emission spectrum of ML layer.…”

2D Dual Anisotropic Conductive Janus Nanostrips Array Pellicle and Derivative 3D Janus‐structural Pipe Concurrently Endowed with Magnetism and Red‐green Two‐colored Fluorescence

“…Wang, et al [20] have prepared carbon nanotubes@PANI hydrogels with three different dimensions (1D, 2D and 3D) by controlling the state of the wall of carbon nanotubes. According to the report, our group has successfully fabricated luminescent-electric-magnetic tri-function anisotropic conductive films by electrospinning technology, which can be used as magnetic shielding and flexible electronic device materials [21][22][23] .…”