Synthesis of Rare Earth Nanomaterials - Rare Earth Nanotechnology - page 29

the reaction of aqueous micelles containing (CTA) PO with reverse

3 4

(CTA = cetyltrimethylammonium and
AOT = bis(2-ethylhexyl)sulfosuccinate) prepared in isooctane [191].
Similarly, using the reverse micelles system, Ghosh

micelles containing Ce(AOT)

3

et al . reported the

synthesis of LaPO nanoparticles and

nanorods and found that the core-shell structured nanostructure
helps to enhance the luminescence efficiency [192].

:Er,Yb and LaPO :Er@YbPO

4 4 4

Figure 1.21 TEM images of different morphologies of YF nanocrystals: (a) 3

typical mixtures of predominant YF particles morphologies;

3

(b) YF quadrilateral-shaped nanocrystals; (c) YF hexagonal

3 3

nanocrystals; (d) self-assembly of YF hexagonal nanocrystals. 3

1.8 Other Routes

Zhang prepared ceria nanorods via ultrasonication at room
temperature with the assistance of polyethylene glycol [193]. The
nanorods are 5-10 nm in diameter and 50-150 nm in length. The
formation may be ascribed to the oriented aggregation and fusing
of small ceria nanoparticles with the aid of ultrasonication. Zhu et

al . reported the sonochemical synthesis of CePO :Tb, CePO :Tb@

4 4

LaPO :Eu nanorods [194, 195]. The products were yielded

within reduced time but still with good crystallinity and uniformity.
Yu

, and YVO 4 4

et al . developed a surfactant-free sonochemical route for REPO 4

nanocrystals under ambient conditions [196]. The afforded products