Designing nanocomposites using supercritical CO2 to insert Ni nanoparticles into the pores of nanopatterned BaTiO3 thin films
authors Castro, A; Morere, J; Cabanas, A; Ferreira, LP; Godinho, M; Ferreira, P; Vilarinho, PM
nationality International
journal JOURNAL OF MATERIALS CHEMISTRY C
keywords CARBON-DIOXIDE SOLUTION; NANOSTRUCTURED MATERIALS; REACTIVE DEPOSITION; FLUID DEPOSITION; NICKEL FILMS; METAL; SOLUBILITY; NANOPOROSITY; FABRICATION; SURFACES
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 degrees 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.
publisher ROYAL SOC CHEMISTRY
issn 2050-7526
year published 2017
volume 5
issue 5
beginning page 1083
ending page 1089
digital object identifier (doi) 10.1039/c6tc04232e
web of science category Materials Science, Multidisciplinary; Physics, Applied
subject category Materials Science; Physics
unique article identifier WOS:000395887300010
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journal analysis (jcr 2017):
journal impact factor 5.976
5 year journal impact factor 5.688
category normalized journal impact factor percentile 86.041
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