NDLI: Solid-state phase transformation mechanism from hexagonal GdPO<sub>4</sub> : Eu<sup>3+</sup> nanorods to monoclinic nanoparticles

Content Provider	Royal Society of Chemistry (RSC)
Author	Cho, Junsang Kim, Chang Hae
Copyright Year	2014
Abstract	GdPO4 : Eu3+ nanorods with the hexagonal phase, prepared by a simple co-precipitation method at 80 °C, were transformed to GdPO4 : Eu3+ nanoparticles with the monoclinic phase upon heating above 800 °C. Based on the in situ observations of XRD, TEM, and SAED, we suggested the phase transformation mechanism of the hexagonal nanorods to monoclinic nanoparticles via diffusion-controlled solid-state transformation. This is associated with the formation of a void inside the nanorods because of the elimination of water, rearrangement of atomic structure, and nucleation and growth of nanoparticles with different crystal structure. Ultimately, prepared GdPO4 : Eu3+ nanorods and nanoparticles can be utilized as an efficient multifunctional nanoprobe for magnetic resonance (MR)/optical imaging due to the prominent orange-red emission of Eu3+ ions at 592 and 615 nm, and the exhibition of saturated magnetization value (Ms) of 0.52 emu g−1 Oe−1 and high r2/r1 value.
Starting Page	31385
Ending Page	31392
Page Count	8
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	4
Issue Number	59
Journal	RSC Advances
DOI	10.1039/c4ra03229b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Transmission electron microscopy Nucleation Monoclinic crystal system Magnetic resonance imaging Medical optical imaging X-ray scattering techniques Nuclear magnetic resonance Coprecipitation
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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