Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 17, Pages 14877-14885Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b01626
Keywords
mesoporous films; nanoengineered composites; surfactant-assisted electrodeposition; atomic layer deposition; magnetic properties
Funding
- European Research Council [648454]
- Spanish Government [MAT2017-86357-C3-1-R]
- Spanish Government (associated FEDER)
- Severo Ochoa Programme for Centres of Excellence in RD [SEV-2015-0496]
- Generalitat de Catalunya [2017-SGR-292, 2017-SGR-1519]
- European Union [665919]
- MINECO [RYC-2012-10839, RYC-2013-12448]
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Mesoporous Ni and Cu-Ni (Cu20Ni80 and Cu45Ni55 in at. %) films, showing a three-dimensional (3D) porous structure and tunable magnetic properties, are prepared by electrodeposition from aqueous surfactant solutions using micelles of P-123 triblock copolymer as structure-directing entities. Pores between 5 and 30 nm and dissimilar space arrangements (continuous interconnected networks, circular pores, corrugated mesophases) are obtained depending on the synthetic conditions. X-ray diffraction studies reveal that the Cu-Ni films have crystallized in the face-centered cubic structure, are textured, and exhibit certain degree of phase separation, particularly those with a higher Cu content. Atomic layer deposition (ALD) is used to conformally coat the mesopores of Cu20Ni80 film with amorphous Al2O3, rendering multiphase nano-in-meso metal-ceramic composites without compromising the ferromagnetic response of the metallic scaffold. From a technological viewpoint, these 3D nanoengineered composite films could be appealing for applications like magnetically actuated micro/nanoelectromechanical systems (MEMS/NEMS), voltage-driven magneto-electric devices, capacitors, or as protective coatings with superior strength and tribological performance.
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