Synthesis of barium fluoride nanoparticles from microemulsion

Abstract

The cetyltrimethylammonium bromide (CTAB)/2-octanol/water microemulsion system was used to synthesize barium fluoride nanoparticles. X-ray powder diffraction (XRD) analysis showed that the products were single phase. The results of scanning electron microscopy and calculations using the Scherrer equation from the line widths of the XRD have been used to estimate the average particle sizes of the powder products. The results showed that the nanoparticle size was affected by water content and surfactant (CTAB) concentration. As water content decreases from 14.2 to 9.47% (w/w), the particle size decreases from 75 to 40 nm. In addition, increasing the reaction times from 5 to 120 min increases the particle size from 75 to 150 nm, and increasing the amount of surfactant decreases the size of the particle. Luminescence spectra of the BaF 2 :Ce nanoparticles are also discussed.

Nucleation and Growth of BaFxCl2−x Nanorods

“…[33] Several BaF 2 nanocrystals have already been reported by Burlitch et al, [34] Hu et al, [35] Shi et al, [36,37] Xie et al, [38] and Qin et al [39] All of these nanocrystals are cubic BaF 2 and have nanocube and nanorod shapes. Thus, there is also a great need to synthesize orthorhombic BaF 2 .…”

Ce3+ emission in hexagonal and orthorhombic phases of CaSO4

“…Such a hexagonal phase at room temperature is observed when CaSO 4 is synthesized in organic media [9]. Thus the change in Ce 3+ emission is due to change in phase rather than particle size as observed for other systems [18]. The hydrated hexagonal phase is not a stable phase and when heated past 160 1C, the sample loses some water of crystallization as could be observed by DTA curve (Fig.…”

Silica‐Coated CaF2:Eu3+ Nanoparticles Functionalized with Oxalic Acid for Bio‐conjugation to BSA Proteins

“…All the reagents used in this study were analytically pure except for spectrographically pure Eu 2 were injected slowly into microemulsion I and II, respectively. After substantial stirring, the two optically transparent microemulsion solutions were mixed and stirred for 30 min.…”