Janus‐Structural AIE Nanofiber with White Light Emission and Stimuli‐Response. Issue 24 (18th May 2022)

• Record Type: Journal Article
• Authors: Zhao, Shikun; Sun, Jiangman; Qin, Zhen; Li, Yufeng; Yu, Hao; Wang, Guan; Gu, Xinggui; Pan, Kai
• Is Part Of: Small. Volume 18:Issue 24(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-05-18
• Subjects: aggregation‐induced emission -- anti‐counterfeiting -- Janus nanofibers -- white light emitting elastomers; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202201117
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: White‐light emitting elastomers (WLEEs) based on stimuli‐responsive aggregation‐induced emission (AIE) and regulated Förster resonance energy transfer (FRET) have aroused increasing attention due to the demands for wearable optoelectronic devices. Herein, the blue and orange AIEgens with different environmental sensitivities are synthesized and then encapsulated on both sides of nanofibers via side‐by‐side electrospinning aiming to achieve the Janus WLEEs. After regulating the blue‐orange AIEgens ratio, efficient and stable white light emission with a CIE coordinate of about (0.33, 0.31) is achieved at a blue‐orange AIEgens mass ratio of 3:1. Besides, the Janus nanofibers (Janus‐NFs) also present super stretchability with elongation at the break over 150% and tensile strength close to 7 MPa. The sensitivity of fluorescence for Janus‐NFs to its stretching deformation is used to visualize the evolution of the microstructure of nanofibers during stretching. Moreover, the Janus‐NFs are also sensitive to HCl and NH3, of which the fluorescence color would change under HCl and NH3 fuming above 2 and 57 ppm in air, respectively. The promising applications of the white light Janus‐NFs in smart fabrics, warning sensors, and anti‐counterfeiting packaging are demonstrated. This finding provides an efficient strategy for achieving wearable WLEEs with multiple functionalities, promoting the development of wearable devices. Abstract : AIEgens‐doped Janus white light‐emitting nanofibers (Janus‐NFs) with multiple stimulus‐response behaviors are prepared, which effectively suppress Förster resonance energy transfer (FRET) progress and demonstrate promising application in the fields of illumination, environmental monitoring, smart wear, and anti‐counterfeiting packaging. Moreover, its fluorescence properties visualize the microstructure changes of Janus‐NFs during uniaxial stretching.