3 years ago

Elasticity of Prussian-Blue-Analogue Nanoparticles

Elasticity of Prussian-Blue-Analogue Nanoparticles
Yannick Guari, Mirko Mikolasek, Azzedine Bousseksou, Gábor Molnár, Gautier Félix, William Nicolazzi, Helena J. Shepherd, Jean-Paul Itié, Jérôme Long, Joulia Larionova, Aleksandr I. Chumakov
We report on the elastic properties of Ni/[Fe(CN)6] Prussian-blue-analogue nanoparticles investigated by high-pressure synchrotron X-ray diffraction and nuclear inelastic scattering. For 3 nm and 115 nm particles, we have obtained bulk moduli of (30.3 ± 3.8) GPa and (24.5 ± 3.2) GPa, with Debye sound velocities of (2496 ± 46) m s–1 and (2407 ± 38) m s–1, respectively. Combining these results, Poisson's ratio, Young's modulus, the shear modulus, and the transversal/longitudinal sound velocities have been calculated for each particle size. All of these physical quantities suggest a stiffening of the lattice when the particle size decreases, which is mainly attributed to the reduction of iron ions on the particle surface. The elastic behavior of Prussian-blue-analogue nanoparticles has been investigated, using high-pressure synchrotron X-ray diffraction and nuclear-inelastic-scattering techniques. We have extracted all of the elastic moduli for different sizes of Prussian-blue-analogue nanoparticles. This result is the basis for understanding electron–lattice coupling phase transitions at the nanoscale.

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

DOI: 10.1002/ejic.201700796

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