Morphology- and magnetism-controlled electrodeposition of Ni nanostructures on TiO2 nanotubes for hybrid Ni/TiO2 functional applications. Issue 9 (15th June 2019)

• Record Type: Journal Article
• Authors: Nasirpouri, Farzad; Cheshideh, Hamed; Samardak, Aleksei Yu.; Ognev, Alexey V.; Zubkov, Alexander A.; Samardak, Alexander S.
• Is Part Of: Ceramics international. Volume 45:Issue 9(2019)
• Page Start: 11258
• Page End: 11269
• Publication Date: 2019-06-15
• Subjects: Electrodeposition -- Nickel -- TiO2 nanotubes -- Magnetization -- FORC; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.02.200
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: We investigate magnetic properties of nickel nanoparticles electrodeposited on TiO2 nanotubes by different techniques including direct current (DC) and cyclic voltammetry (CV) deposition. TiO2 nanotubes were fabricated by anodic oxidation from an organic electrolyte under constant voltage on Ti substrates. Using scanning and transmission electron microscopies, we observe that each technique provides different morphologies: DC electrodeposition makes large coalesced Ni nanoparticles mostly accumulated on top surface and mouths of the nanotubes, whereas CV deposition produces a homogenous dispersion of Ni nanoparticles across the nanotubes. The variation of coercivity and saturation magnetization values recorded is consistent with our scenario, though owing to large number of nanoparticles with size and shape varieties. The first order reversal curve (FORC) diagrams help to reveal the magnetic behavior of nanoparticle ensembles in relation to their morphology and crystal structure. Graphical abstract: Image 1