guest ::
| Home > Publications database > Bis((dialkylamino)alkylselenolato)metal complexes as precursors for microwave-assisted synthesis of semiconductor metal selenide nanoparticles of zinc and cadmium in the ionic liquid [BMIm][ BF4] |
| Home > Publications database > Bis((dialkylamino)alkylselenolato)metal complexes as precursors for microwave-assisted synthesis of semiconductor metal selenide nanoparticles of zinc and cadmium in the ionic liquid [BMIm][ BF4] |
| Journal Article | FZJ-2017-07716 |
; ; ; ;
2015
Elsevier
Amsterdam [u.a.]
This record in other databases:
Please use a persistent id in citations: doi:10.1016/j.nanoso.2015.06.001
Abstract: Based on (dimethylamino)ethyldiselenide, (diethylamino)ethyldiselenide and (dimethylamino)propyldiselenide six different bis(dialkylamino)alkylselenolates with zinc and cadmium were decomposed by microwave irradiation in the ionic liquid (IL) 1-butyl-3-methyl-imidazolium tetrafluoridoborate ([BMIm][BF4]) to give the respective metal selenide nanoparticles. In comparison to common methods like the hot injection method attention was paid how variations of the ligand system and different decomposition times affect the nanoparticle synthesis with respect to size, shape, crystallinity and crystal phase. The decomposition of the single-source zinc and cadmium precursors in the fluorous IL led mostly to spherical, crystalline and only slightly agglomerated nanoparticles. No formation of ZnF2 or CdF2 was observed which is different from the known dual-source synthesis. In case of the zinc precursors, hexagonal and cubic ZnSe with a particle diameter between 4–7 nm were obtained, whereas in case of the cadmium precursors hexagonal CdSe with an average particle diameter of 10–19 nm were prepared. An increase in decomposition time from 5 to 15 min at 250 °C mostly led to similar results concerning the particle size and crystal phase which is different from the hot injection method, thereby suggesting that the IL has a decisive role for nanocrystal growth and stabilization. No further stabilizing agents were necessary to reproducibly prepare ZnSe or CdSe particles with an average diameter below 10 or 20 nm, respectively. All dispersions of the metal selenide nanoparticles in [BMIm][BF4] were characterized by high resolution transmission electron microscopy (HR-TEM), energy dispersive X-ray spectroscopy (EDX) and X-ray powder diffraction (PXRD).
|
The record appears in these collections: |
PDF
PDF (PDFA)