3 years ago

Engineered Au Core@Prussian Blue Analogous Shell Nanoheterostructures: Their Magnetic and Optical Properties

Engineered Au Core@Prussian Blue Analogous Shell Nanoheterostructures: Their Magnetic and Optical Properties
Jérôme Long, Yannick Guari, Guillaume Maurin-Pasturel, Christian Guérin, Clarence Charnay, Maria A. Palacios, Marc-Georg Willinger, Alexander A. Trifonov, Joulia Larionova
We report a new approach for the synthesis of multifunctional Au core@Prussian Blue analogous (PBA) shell nanoheterostructures that involves PBA shell growth on the surface of cyanide-stabilized gold nanoparticles. It permits the assembly of Au@KNiII[FeII(CN)6] core@shell and Au@KNiII[FeII(CN)6]@KNiII[CrIII(CN)6] core@shell@shell heterostructures with well-defined and size-controlled gold cores and PBA shells. These heterostructures exhibit tunable size- and shape-dependent magnetic and optical properties: (i) the surface plasmon resonance band position and intensity mainly depend on the PBA shell thickness, and (ii) the magnetic properties (the transition temperature, the coercivity, and magnetic regime) depend in a complex manner on the thickness as well as the particular morphology of the magnetic shell. Gold in magnetic shells: New multifunctional Au core@Prussian Blue analogous shell nanoheterostructures (see graphic) exhibit size- and shape-dependent magnetic and optical properties, which may be tuned by controlling the shell thickness and composition.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201605903

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