Dy3+ and Eu3+ complexes co-doped flexible composite nanofibers to achieve tunable fluorescent color

Abstract

Color-tunable flexible composite nanofibers containing Dy(BA) 3 phen and Eu(BA) 3 phen complexes have been successfully fabricated via a facile electrospinning process. Scanning electron microscopy, energy dispersive spectrometry and fluorescence spectroscopy were used to characterize the samples. The diameter of the composite nanofibers is 420.83 ± 6.55 nm. Tunable color from greenish blue to white to orange can be realized in a single flexible composite nanofiber by varying the mass ratio of Dy(BA) 3 phen-Eu(BA) 3 phen, and it is the first time to obtain white-light-emitting flexible nanofibers using rare earth complexes as luminescent centers. In particular, the composite nanofibers can respectively emit cool and warm white light with certain doping contents of Dy(BA) 3 phen and Eu(BA) 3 phen. The novel color-tunable composite nanofibers have potential applications in the fields of fluorescent lamps, field emission displays and color displays.

A new route to fabricate PbS nanofibers and PbSe nanofibers via electrospinning combined with double-crucible technique

“…Double-crucible technique has been proved to be an efficient, convenient and simple way to fabricate nanofibers, nanobelts and hollow nanofibers [24]. Meanwhile, electrospinning is a promising, straightforward and convenient way to prepare one-dimensional (1D) nanomaterials [25,26] with diameters ranging from tens of nanometers up to micrometers owing to its easy control and low cost, including nanofibers [27,28], core-shell structured nanofibers [29,30], core-shell structured nanotubes [31,32], nanowires [33], nanosheets [34,35] and nanobelts [36][37][38], etc. Nevertheless, the fabrication of PbS or PbSe nanofibers via electrospinning combined with a doublecrucible technique is not reported.…”

Magnetism and white-light-emission bifunctionality simultaneously assembled into flexible Janus nanofiber via electrospinning

“…phosphors [6][7][8]. Our recent work has demonstrated that tunable color and whitelight-emitting can also be achieved by co-doping of dysprosium and europium complexes into polymer-based nanofibers [9]. One-dimensional (1D) nanomaterials with luminescent function can be possibly used as drug carriers, and the drug release amount can be monitored by the variation of luminescence intensity [10].…”

“…The precipitates were collected from the solution by magnetic separation, and then dried in an electric vacuum oven at 60°C for 6 h. Dy(BA) 3 phen, Tb(BA) 3 phen, and Eu(BA) 3 phen powders were synthesized according to the traditional method as described in the Refs. [9,24]. 1.8650 g of Dy 2 O 3 was dissolved in 10 mL of concentrated nitric acid and then crystallized via evaporation of excess nitric acid and water by heating, and Dy(NO 3 ) 3 Á6H 2 O powders were acquired.…”

“…On the contrary, more aggregates of Eu(BA) 3 phen are formed in the polymer matrix with introducing more Eu(BA) 3 phen. The exciton migration between the Eu(BA) 3 phen molecules shortens the fluorescence lifetime of Eu 3?[9].In order to illustrate the advantage of the nanostructure of the magnetic-fluorescent bifunctional Janus nanofibers, the PL spectra of[Fe 3 O 4 /PVP]//[(10%Dy(BA) 3 phen ? 0.1%Tb(BA) 3 phen ?…”