Shape-controlled syntheses of metal oxide nanoparticles by the introduction of rare-earth metals

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Here, we report the size- and shape-controlled synthesis of metal oxide nanoparticles through the introduction of rare-earth metals. The addition of gadolinium oleate in the synthesis of iron oxide nanoparticles induced sphere-to-cube shape changes of nanoparticles and generated iron oxide nanocubes coated with gadolinium. Based on experimental investigations and density functional theory (DFT) calculations, we attribute the shape change to the facet-selective binding of undecomposed gadolinium oleates. While many previous studies on the shape-controlled syntheses of nanoparticles rely on the stabilization of specific crystal facets by anionic surfactants or their decomposition products, this study shows that the interaction between growing transition metal oxide nanoparticles and rare-earth metal complexes can be used as a robust new mechanism for shape-controlled syntheses. Indeed, we demonstrated that this approach was applicable to other transition metal oxide nanoparticles (i.e., manganese oxide and manganese ferrite) and rare earth metals (i.e., gadolinium, europium, and cerium). This study also demonstrates that the nature of metal-ligand bonding can play an important role in the shape control of nanoparticles.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2017-02
Language
English
Article Type
Article
Keywords

IRON-OXIDE; MAGNETIC-PROPERTIES; OPTICAL-PROPERTIES; NANOCRYSTALS; NANOCUBES; NANOSPHERES; CONVERSION; STABILITY; ROUTE; AGENT

Citation

NANOSCALE, v.9, no.8, pp.2732 - 2738

ISSN
2040-3364
DOI
10.1039/C6NR07555J
URI
http://hdl.handle.net/10203/220962
Appears in Collection
NT-Journal Papers(저널논문)
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