Microwave-assisted one-pot synthesis of water-soluble rare-earth doped fluoride luminescent nanoparticles with tunable colors

Abstract

Polyethyleneimine (PEI) functionalized multicolor luminescent LaF3 nanoparticles were synthesized via a novel microwave-assisted method, which can achieve fast and uniform heating under eco-friendly and energy efficient conditions. The as-prepared nanoparticles possess a pure hexagonal structure with an average size of about 12 nm. When doped with different ions (Tb3+ and Eu3+), the morphology and structure of the nanoparticles were not changed, whereas the optical properties varied with doped ions and their molar ratio, and as a result emission of four different colors (green, yellow, orange and red) were achieved by simply switching the types of doping ions (Eu3+ versus Tb3 +) and the molar ratio of the two doping ions.

Lanthanide Nanoparticles: From Design toward Bioimaging and Therapy

“…Xu and co-workers prepared lanthanide doped LaF 3 nanoparticles with the microwave-assisted synthesis. 103 Ln 3+ -based chlorides, nitrates, and NaF were used as precursors, and ethylene glycol was used as solvents. Polyethylenimine (PEI) molecules were added as the capping agents to control the growth of nanoparticles.…”

The thermal stability and structural site-distribution of Eu3+ ions in the red-emitting phosphors Ca9Eu2W4O24 and Sr9Eu2W4O24

“…There have been extensive studies on new phosphors for W-LEDs [3][4][5][6][7][8][9][10]. In particular Eu 3+ -doped oxyacid materials such as tungstates [11], silicates [14], vanadates [15], borates [16] and phosphates [11][12][13][14][15][16][17] have been investigated for red emitting phosphors.…”

Ultrasonic mediated synthesis of monodispersed lanthanum hydroxide nanorods for possible bioimplant application

“…Similar interplanar spacings corresponding to the planes characteristic of La(OH) 3 have been reported [10,46]. Lanthanum based nanoparticles have been prepared in different forms like nanotubes [2], nanowires [20,47], nanospheres [5,22,48], nanocubes [6] and 3D bundles [21] for various applications. According to Niasari et al use of CTAB helps in the induction of preferential growth at the same time preventing the agglomeration of particles [4].…”

“…They are also used as components of optoelectronic materials, upconversion materials and fluorescent agents in biological imaging [11][12][13][14][15]. A wide range of preparation techniques have been developed for lanthanum based nanoparticles including non-aqueous [16], sol-gel [17,18], solvothermal [19], hydrothermal [20], sonochemical [8,9], microwave-assisted [21,22], etc. A common feature of several of these synthesis techniques is the use of toxic stabilising agents that makes them unsuitable for biomedical use.…”

“…cetyl trimethylammonium bromide (CTAB) polyvinylpyrrolidone (PVP), hydrazine hydrate, polyethyleneimine etc.) [1,3,4,22]. One of the primary contributions of this paper is a synthesis technique for LaNRs that is bio-compatible in the sense that no toxic substances are used in the stabilization step.…”