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Issue 5, 2017
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Designing nanocomposites using supercritical CO2 to insert Ni nanoparticles into the pores of nanopatterned BaTiO3 thin films

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Abstract

A new concept to prepare nanocomposite thin films is explored. Two chemical-based bottom-up steps are used to design functional films including (i) the block copolymer-assisted self-assembly of a porous matrix; and (ii) the impregnation of nanoparticles from a ferroic phase into the pores by supercritical CO2 deposition. Porous nanopatterned BaTiO3 thin films with ca. 17 nm thickness are prepared using a cost-effective sol–gel solution containing a block copolymer and evaporation-induced self-assembly methodology. Hexagonally arranged pores with a diameter of ca. 95 nm, running perpendicular to the substrate, are filled with Ni nanoparticles using the supercritical fluid deposition technique, obtained from the reduction of hydrated nickel nitrate in a supercritical CO2–ethanol mixture at 250 °C. Small Ni nanoparticles of 21 ± 5 nm size are selectively deposited inside the pores of the porous matrix. Structural and magnetic properties prove the coexistence of both phases.

Graphical abstract: Designing nanocomposites using supercritical CO2 to insert Ni nanoparticles into the pores of nanopatterned BaTiO3 thin films

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Publication details

The article was received on 29 Sep 2016, accepted on 19 Dec 2016 and first published on 19 Dec 2016


Article type: Paper
DOI: 10.1039/C6TC04232E
Citation: J. Mater. Chem. C, 2017,5, 1083-1089

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    Designing nanocomposites using supercritical CO2 to insert Ni nanoparticles into the pores of nanopatterned BaTiO3 thin films

    A. Castro, J. Morère, A. Cabañas, L. P. Ferreira, M. Godinho, P. Ferreira and P. M. Vilarinho, J. Mater. Chem. C, 2017, 5, 1083
    DOI: 10.1039/C6TC04232E

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