Laser Irradiation of Gd-Si and Gd-Si-Ge Colloid Mixtures for the Fabrication of Compound Nanoparticles

Natalie Tarasenka; Vasili Kiris; Evaldas Stankevičius; Nikolai Tarasenko; Vladimir Pankov; František Krčma; Paulius Gečys; Gediminas Račiukaitis

doi:10.1002/cphc.201800753

Laser Irradiation of Gd-Si and Gd-Si-Ge Colloid Mixtures for the Fabrication of Compound Nanoparticles

Chemphyschem. 2018 Oct 4. doi: 10.1002/cphc.201800753. Online ahead of print.

Authors

Natalie Tarasenka¹, Vasili Kiris¹, Evaldas Stankevičius², Nikolai Tarasenko¹, Vladimir Pankov³, František Krčma⁴, Paulius Gečys², Gediminas Račiukaitis²

Affiliations

¹ B.I. Stepanov Institute of physics, National Academy of Sciences of Belarus, 68 Nezalezhnasti ave., 220072, Minsk, Belarus.
² Center for Physical Sciences and Technology, 231 Savanoriu Ave., LT-02300, Vilnius, Lithuania.
³ Chemical Department, Belarusian State University, 14 Leningradskaya Str., 220006, Minsk, Belarus.
⁴ Faculty of Chemistry, Brno University of Technology, 118 Purkynova Str., 612 00, Brno, Czech Republic.

PMID: 30285314
DOI: 10.1002/cphc.201800753

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, T_C , 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.

Keywords: colloids; gadolinium; laser-induced chemical interactions; magnetic properties; nanoparticles.

Abstract

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