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TitleSolution synthesis of monodisperse indium nanoparticles and highly faceted indium polyhedra
Publication TypeJournal Article
Year of Publication2010
AuthorsLim, T.H., Ingham B., Kamarudin K.H., Etchegoin P.G., and Tilley R.D.
JournalCrystal Growth and Design
Pagination3854 - 3858
Date Published2010
ISSN15287483 (ISSN)
KeywordsAmine solvents, Catalyst activity, Geometry, Gold compounds, Heterogeneous growth, Indium, Indium metal, Indium nanoparticles, Lithium, Lithium borohydride, Monodisperse, Nanoparticles, Oleylamine, One pot, Organic solvents, Organoindium, Reduced pressure, Small gold clusters, Solution synthesis, Spherical nanoparticles, Surface active agents, Synthetic methods, Trioctylphosphine oxide, Trioctylphosphines
AbstractWe report a simple and effective synthetic method to prepare monodisperse indium metal nanoparticles less than 10 nm in size via a simple lithium borohydride reduction method conducted in amine based solvents. The method has advantages over literature methods; in particular, use of highly reactive and costly organoindium precursors and small gold clusters is required for the heterogeneous growth of sub-10-nm indium nanoparticles. Highly monodisperse spherical nanoparticles produced in one pot in our system could be selectively passivated with commonly available surfactants, including oleylamine, trioctylphosphine and trioctylphosphine oxide. The amine solvents could be readily moved by evaporation under reduced pressure and the particles easily redispersed in common organic solvent in colloidal form. Additionally, highly faceted polyhedra of indium metal could also be produced under specific conditions. © 2010 American Chemical Society.

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