Novel Electrospun Dual-Layered Composite Nanofibrous Membrane Endowed with Electricity–Magnetism Bifunctionality at One Layer and Photoluminescence at the Other Layer

Abstract

Dual-layered composite nanofibrous membrane equipped with electrical conduction, magnetism and photoluminescence trifunctionality is constructed via electrospinning. The composite membrane consists of a polyaniline (PANI)/FeO nanoparticles (NPs)/polyacrylonitrile (PAN) tuned electrical-magnetic bifunctional nanofibrous layer at one side and a Eu(TTA)(TPPO)/polyvinylpyrrolidone (PVP) photoluminescent nanofibrous layer at the other side, and the two layers are tightly combined face-to-face together into the novel dual-layered composite membrane with trifunctionality. The electric conductivity and magnetism of electrical-magnetic bifunctionality can be respectively tunable via modulating the respective PANI and FeO NPs contents, and the highest electric conductivity approaches the order of 1 × 10 S cm. Predominant red emission at 615 nm can be obviously observed in the photoluminescent layer under 366 nm excitation. Moreover, the luminescent intensity of photoluminescent layer is almost unaffected by the electrical-magnetic bifunctional layer because of the fact that the photoluminescent materials have been successfully isolated from dark-colored PANI and FeO NPs. The novel dual-layered composite nanofibrous membrane with trifunctionality has potentials in many fields. Furthermore, the design philosophy and fabrication method for the dual-layered multifunctional membrane provide a new and facile strategy toward other membranes with multifunctionality.

Conjugate Electrospinning Construction of Microyarns with Synchronous Color-Tuned Photoluminescence and Tunable Electrical Conductivity

“…It is well-known that the charge transport ability provided by connecting conductive network plays a very important role in the conductivity of PANI. 66 As seen in Table V, the average conductivity values of the hetero-structured microyarns increase gradually from 2.58 9 10 À4 S cm À1 to 4.03 9 10 À3 S cm À1 , while the percentages of PANI to PAN range from 15% to 70%. The electrical conductivity of the hetero-structured microyarns can be adjusted by modulating the contents of PANI.…”

2D double aeolotropic conductive Janus pellicle with multi-functionality then derived 3D dual-wall Janus-type tube

“…The particular Janus structure can reduce the pernicious effects of varying materials by limiting them in their respective fields at the microlevel. For example, for electrically conductive-luminescent-magnetic multifunctional materials, according to the reports [12][13][14], when conductive, luminescent and magnetic materials are directly blended together, unfavorable interferences will occur. Using Janus structural materials to separate different materials can effectively reduce its adverse effects.…”

Assembling 1D and Janus Nanobelts into 2D Aeolotropic Conductive Janus Membranes and 3D Double‐Walled Janus Tubes

“…At present, multi-functional nanomaterials [13,14] have attracted extensive attention from researchers. Nanomaterials [15][16][17][18][19][20][21][22][23] with a single function such as magnetic, [24] conductive [25] or fluorescent characteristics [26,27] are developing towards multifunctional nanomaterids such as with magnetismfluorescence, [28][29][30] fluorescence-conduction, [31,32] conduction-magnetism [33,34] dual-functionality and fluorescence-conductionmagnetism [35,36] tri-functionality.…”