Formation of core – shell Fe@Al nanoparticles by laser irradiation of a mixture of colloids in ethanol
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. (paper)
- OSTI ID:
- 23000312
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Vol. 48, Issue 7; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
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