Formation of core – shell Fe@Al nanoparticles by laser irradiation of a mixture of colloids in ethanol. (July 2018)

• Record Type: Journal Article
• Authors: Barmina, E.V.; Shafeev, G.A.
• Is Part Of: Quantum electronics. Volume 48:Number 7(2018)
• Page Start: 637
• Page End: 640
• Publication Date: 2018-07
• Subjects: laser irradiation -- liquid -- core - shell nanoparticles; Quantum electronics -- Periodicals; 537.5
• DOI: 10.1070/QEL16621
• Languages: English
• ISSNs: 1063-7818

Abstract

Abstract: The formation of Fe@Al nanoparticles, containing an iron core and an aluminium shell, under laser irradiation of a mixture of individual colloids of nanoparticle components in absolute ethanol has experimentally been investigated for the first time. A mixture of colloids was irradiated by a sequence of neodymium laser pulses with duration of 10 ns and repetition rate of 10 kHz. It is found that the size of the iron core of core – shell nanoparticles increases from the initial value of 8 nm to 20 nm under irradiation, whereas the aluminium shell size decreases from the initial value of 120 nm to 70 nm. The formation of core – shell nanoparticles is explained by the difference in the melting temperatures of the initial nanoparticles and the difference in the lattice parameters of their materials. The thus obtained core – shell nanoparticles retain ferromagnetic properties. Possible applications of these nanoparticles are discussed.