Wire-in-tube nanofiber as one side to construct specific-shaped Janus nanofiber with improved upconversion luminescence and tunable magnetism

Miniaturized Biosensors Based on Lanthanide-Doped Upconversion Polymeric Nanofibers

“… Enhanced PL (Phololuminescence) of UCNP@Nanofiber ([YF 3+ :Yb 3+ , Er 3+ @SiO 2 ]//CoFe 2 O 4 WJNFs) (Adapted from [ 74 ]). …”

“…Simultaneous synthesis of SiO 2 , rare earth fluoride, wire-in-tube nanofibers, Janus nanofibers, and magnetic CoFe 2 O 4 was achieved without the need for any extra protective gases. The in situ synthesis of unique Janus nanofibers via a one-pot mode offers the avoidance of post-processing procedures, and significantly improved the luminescence property (Figure 4) [74]. The trend to embed fluorescent or upconverted nanoparticles onto the enzyme immobilized nanofiber for the monitoring of enzymatic activities is on rise.…”

Fluorescence-Selective Absorption and Circularly Polarized Fluorescence Energy Transfer Assist the Generation of Multicolor Circularly Polarized Luminescence in Chiral Helical Polyacetylene-Based Janus Nanofibers

“…Delightedly, the past few years have witnessed the rapid development of an electrospinning technique, and it has proved to be an effective method for constructing flexible and continuous CPL nanofibers with a controlled morphology, uniformity, and the desired optical properties. − The advantages of electrospinning include ease of operation, reliable reproducibility, and low cost. Moreover, multilevel structured nanofibers have also been realized by electrospinning. , For instance, Janus nanofibers composed of two distinct materials or phases within a single fiber can be prepared by using a parallel electrospinning nozzle. − It can be expected that introducing a Janus structure into CPL nanofibers has many scientific significances, including (1) offering more options for chiral and fluorescence substances, especially the ones with different compatibility (e.g., one is water-soluble and the other is oil-soluble), and (2) providing a spatial isolation between a chiral substance and a fluorescence substance for better understanding the CPL generation mechanism/process. Unfortunately, to the best of our knowledge, there has been no report concerning CPL-active Janus nanofibers so far.…”