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Sensors 2013, 13(8), 10358-10369; doi:10.3390/s130810358

Synthesis of Bimetallic Platinum Nanoparticles for Biosensors

Centre for Materials Engineering, Department of Mechanical Engineering, University of Cape Town, Private Bag, Rondebosch 7701, South Africa
Department of Engineering, Macquarie University, Sydney, NSW 2109, Australia
Author to whom correspondence should be addressed.
Received: 2 July 2013 / Revised: 5 August 2013 / Accepted: 7 August 2013 / Published: 12 August 2013
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The use of magnetic nanomaterials in biosensing applications is growing as a consequence of their remarkable properties; but controlling the composition and shape of metallic nanoalloys is problematic when more than one precursor is required for wet chemistry synthesis. We have developed a successful simultaneous reduction method for preparation of near-spherical platinum-based nanoalloys containing magnetic solutes. We avoided particular difficulties in preparing platinum nanoalloys containing Ni, Co and Fe by the identification of appropriate synthesis temperatures and chemistry. We used transmission electron microscopy (TEM) to show that our particles have a narrow size distribution, uniform size and morphology, and good crystallinity in the as-synthesized condition. Energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) confirms the coexistence of Pt with the magnetic solute in a face-centered cubic (FCC) solid solution.
Keywords: biosensors; bimetallic nanoparticles; magnetic nanoparticles; platinum nanoalloys; Pt-Ni; Pt-Co; Pt-Fe biosensors; bimetallic nanoparticles; magnetic nanoparticles; platinum nanoalloys; Pt-Ni; Pt-Co; Pt-Fe
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Leteba, G.M.; Lang, C.I. Synthesis of Bimetallic Platinum Nanoparticles for Biosensors. Sensors 2013, 13, 10358-10369.

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