Small-angle X-ray and small-angle neutron scattering investigations of colloidal dispersions of magnetic nanoparticles and clay nanoplatelets

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Abstract

We investigated mixed colloidal dispersions of clay platelets and magnetic nanoparticles using small-angle X-ray and neutron scattering. Our results show that the contribution to the scattering is essentially due to the magnetic nanoparticles. The scattering intensities are proportional to the concentration of magnetic particles, indicating that from the scattering point of view the sample is a colloidal dispersion of non-interacting magnetic objects, although the laponite and magnetic particles clearly interact when the sample textures are observed in an optical microscope. The visually observed phase separation may be characterized as a liquid-gas transition. © International Union of Crystallography 2007.

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Paula, F. L. O., Aquino, R., Da Silva, G. J., Depeyrot, J., Tourinho, F. A., Fossum, J. O., & Knudsen, K. D. (2007). Small-angle X-ray and small-angle neutron scattering investigations of colloidal dispersions of magnetic nanoparticles and clay nanoplatelets. In Journal of Applied Crystallography (Vol. 40). https://doi.org/10.1107/S0021889807009181

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