Janus nanofiber array pellicle: facile conjugate electrospinning construction, structure and bifunctionality of enhanced green fluorescence and adjustable magnetism

Abstract

A [Fe 3 O 4 /polyvinyl pyrrolidone (PVP)]//[Tb(BA) 3 phen/PVP] Janus nanofiber array pellicle (denoted JNAP) was successfully constructed by facile conjugate electrospinning without twisting for the first time. The JNAP offers the dual-functionality of fluorescence and magnetism. This technology entirely solves the dilemma of the magnetic spinning dope and fluorescent spinning dope being easily mixed together during the parallel electrospinning process, as it achieves complete segregation of magnetic nanoparticles and fluorescent molecules. Moreover, conjugate electrospinning without twisting has fewer requirements on the viscosity of the spinning dope compared with parallel electrospinning, in which the two spinning dopes should have the same viscosity. It was satisfactorily found that the JNAP has higher fluorescence intensity than the corresponding non-aligned Janus nanofiber pellicle. The magnetism of the JNAP could be tailored by changing the doping amount of the Fe 3 O 4 NPs. The JNAPhas potential applications in nanotechnology and biomedicine, etc., due to its enhanced green fluorescence and adjustable magnetism. In addition, this design concept and manufacturing process provide a facile way for preparing other one-dimensional Janus nanomaterials with multifunctionality.

The Development and Bio-applications of Multifluid Electrospinning

“…The Janus structure can be a better choice than uniaxial electrospinning in some cases, because two kinds of materials that provide different functions will affect each other. The separation will let them perform well [48,49]. A fiber with two parts and can realize two or three functions those can be mutual independence, such as fluorescence and magnetic properties [48,50,51].…”

“…The separation will let them perform well [48,49]. A fiber with two parts and can realize two or three functions those can be mutual independence, such as fluorescence and magnetic properties [48,50,51]. Fluorescence property are easily affected by magnetic substances, which will lower the fluorescence property if the two materials mixed in one fiber.…”

A review on electrospun magnetic nanomaterials: methods, properties and applications

“…Such combinations have been exploited to access morphologies such as the yarn twist (Fig. 2(i)), Janus array fibre films 28,35,47 and oriented coaxial fibres. 48 Wang et al 36 fabricated highly fluorescent membranes made up of Janus NFs composed of magnetic [Fe 3 O 4 /polyvinylpyrrolidone (PVP)] and fluorescent terbium ligand complex Tb(BA) 3 phen/PVP (where BA is benzoic acid and phen is phenanthroline) NFs.…”

Most recent developments in electrospun magnetic nanofibers: A review

“…Conjugate electrospinning was performed using two syringes with plastic spinnerets for the two solutions and a rotating drum as collector, resulting in aligned nanofibers with similar diameters. 61 Xi et al 62 created luminescent, magnetic, and electrically conductive Janus fibers via a homemade coaxis/ monoaxis spinneret, preparing a coaxial Fe 3 O 4 /PVP core and a Eu(benzoic acid) 3 1,10-phenanthroline/PVP shell as one part of the fiber, and adding the conductivity by the second half of the fiber, consisting of polyaniline/PVP. Janus fibers from CoFe 2 O 4 /PAN and 1,8-naphthalene anhydride/PVP were electrospun, revealing good magnetic and fluorescent properties.…”