We synthesized luminescent CsPbBr3 nanocrystals with a high quantum yield and realized patterning and color-purity light-emitting diode applications.
Multistructural and versatile fibers have attracted enormous interests in various potential applications ranging from tissue engineering and cells to sensors. However, the controllable fabrication and nonwoven assembly of fibers remain a challenge. Here, we developed a novel strategy to in situ fabricate supramolecular hydrogel fibers via microfluidic spinning technology where self-healing fibers can be nonwoven assembled into fabrics through noncovalent interactions (host− guest interactions). We utilized β-cyclodextrin as the host molecule and N-vinylimidazole as the guest molecule to achieve self-healing supramolecular hydrogel fibers. Through design of different microreactors, the beaded, cylindrical, and knotted structure in fibers were achieved. Additionally, we constructed multidimensional (2D plane, 3D bulk, and 3D spiral textile) materials by using self-healing fibers as building blocks. In virtue of the host−guest assembly, the as-fabricated fabric exhibits high flexibility with high strength and long-term stretching behavior. From a practical standpoint, we employed the hydrogel fibers to construct a self-healing conductive composite wire and a planeshaped supercapacitor, which could power light-emitting diodes. Our main aim is to clarify the paramount role of designing various fabrics through noncovalent interactions based on the interfibrillar self-healing feature, which gives a new insight into the facile fabrication of fabrics as well as the next-generation wearable textiles.
The large‐scale fabrication of the flexible fiber‐shaped micro‐supercapacitors has received major attention from both industrial and academic researchers. Herein, conductive and robust polyaniline‐wrapped multiwall carbon tubes reduced graphene oxide/thermoplastic polyurethane (PANI/MCNTs‐rGO/TPU) composite fibers are successfully fabricated on a large scale via the combination of facile microfluidic‐spinning process and in situ polymerization of aniline. Initially, MCNTs‐rGO/TPU fibers are formed in a T‐shape microfluidic chip, relying on the fast material diffusion and exchange in the microfluidic channel. Then, PANI/MCNTs‐rGO/TPU hybrid fibers are synthesized through an in situ chemical oxidative polymerization of aniline. With the assistance of polyaniline, these PANI/MCNTs‐rGO/TPU hybrid fibers exhibit enhanced electrochemical properties in comparison with pure MCNTs‐rGO/TPU fibers, especially in high specific capacitance, which is dramatically increased from 42.1 to 155.5 mF cm−2. Moreover, the PANI/MCNTs‐rGO/TPU hybrid fibers can endure various blending stresses, contributing to its outperforming flexibility and weavability. The best of the excellent electrochemical and mechanical properties of these conductive fibers is made to construct the flexible supercapacitors and various complicated functional fabrics.
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