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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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Castro, Alichandra and Morère, Jacobo and Cabañas, Albertina and Ferreira, Liliana and Godinho, Margarita and Ferreira, Paula and Vilarinho, Paula (2016) Designing nanocomposites using supercritical CO2 to insert Ni nanoparticles into the pores of nanopatterned BaTiO3 thin films. Journal of Materials Chemistry C . ISSN 2050-7526 (Print + online)

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Official URL: http://pubs.rsc.org/en/content/articlelanding/2017/tc/c6tc04232e#!divAbstract



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) block copolymerassisted self-assembly of a porous matrix; and ii) impregnation of nanoparticles from a ferroic phase within the pores by supercritical CO2 deposition. Porous nanopatterned BaTiO3 thin films with ca. 17 nm of thickness are prepared using a cost-effective solgel solution containing a block copolymer and evaporation-induced self-assembly methodology. Hexagonal-arranged pores with diameter of ca. 95 nm, running perpendicularly to the substrate are filled with Ni nanoparticles using the supercritical fluid deposition technique from reduction of hydrated nickel nitrate in a supercritical CO2-ethanol mixture at 250 ºC. Small Ni nanoparticles with 21 ± 5 nm nm are selectively deposited inside the pores of the porous matrix. Structural and magnetic properties prove the coexistence of both phases.


Item Type:Article
Uncontrolled Keywords:Nanocomposite thin films; nanopatterned porous films, supercritical CO2 deposition, Ni nanoparticles, functional
Subjects:Sciences > Chemistry > Chemistry, Physical and theoretical
ID Code:40826
Deposited On:16 Jan 2017 12:59
Last Modified:01 Feb 2018 00:01

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