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Synthesis, Alignment, and Magnetic Properties of Monodisperse Nickel Nanocubes

DOI: 10.1021/ja210209r DOI Help

Authors: Alec P. Lagrow (Victoria University of Wellington) , Bridget Ingham (Industrial Research Limited and MacDiarmid Institute) , Soshan Cheong (Victoria University of Wellington; Industrial Research Limited and MacDiarmid Institute) , Grant V. M. Williams (Victoria University of Wellington; Industrial Research Limited and MacDiarmid Institute) , Christian Dotzler (Industrial Research Limited and MacDiarmid Institute; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory) , Michael F. Toney (Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory) , David A. Jefferson (The University Chemical Laboratories, Cambridge University) , Elena C. Corbos (Johnson Matthey Technology Centre) , Peter T. Bishop (Johnson Matthey Technology Centre) , James Cookson (Johnson Matthey Technology Centre) , Richard D. Tilley (Victoria University of Wellington; Industrial Research Limited and MacDiarmid Institute)
Co-authored by industrial partner: Yes

Type: Journal Paper
Journal: Journal Of The American Chemical Society , VOL 134 (2) , PAGES 855 - 858

State: Published (Approved)
Published: January 2012
Diamond Proposal Number(s): 6687

Abstract: This Communication describes the synthesis of highly monodispersed 12 nm nickel nanocubes. The cubic shape was achieved by using trioctylphosphine and hexadecylamine surfactants under a reducing hydrogen atmosphere to favor thermodynamic growth and the stabilization of {100} facets. Varying the metal precursor to trioctylphosphine ratio was found to alter the nanoparticle size and shape from 5 nm spherical nanoparticles to 12 nm nanocubes. High-resolution transmission electron microscopy showed that the nanocubes are protected from further oxidation by a 1 nm NiO shell. Synchrotron-based X-ray diffraction techniques showed the nickel nanocubes order into [100] aligned arrays. Magnetic studies showed the nickel nanocubes have over 4 times enhancement in magnetic saturation compared to spherical superparamagnetic nickel nanoparticles.

Subject Areas: Materials


Instruments: I22-Small angle scattering & Diffraction

Other Facilities: Stanford Synchrotron Radiation Lightsource

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