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Published on: May 20, 2014
Laser Irradiation of Gd-Si and Gd-Si-Ge Colloid Mixtures for the Fabrication of Compound Nanoparticles
Natalie Tarasenka1, Vasili Kiris1, Evaldas Stankevičius2
1B.I. Stepanov Institute of physics, National Academy of Sciences of Belarus, 68 Nezalezhnasti ave., 220072, Minsk, Belarus.
Abstract:
Binary (Gd5 Si4 , GdSi) and ternary (Gd5 Si2 Ge2 ) compound nanoparticles (NPs) were prepared by laser irradiation of a mixture of colloidal solutions containing NPs of the relevant elements. It is assumed that the compound NPs are formed by heating, co-melting, and chemical interactions in the alloyed droplets. The blackbody-like radiation of the heated NPs was used for temperature control of the NP-preparation process. The obtained results demonstrate that laser irradiation of colloidal NPs provides unique possibilities not only for the synthesis of compound NPs but also for control of their phase composition and size. The synthesized Gd-based compound NPs exhibited magnetic transition at an ordering temperature, TC , in the range of 310-320 K. Thus, the magnetic properties of the synthesized particles confirm their potential for biomedical applications, in particular, for magnetic hyperthermia treatment.
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