Chemically ordered face-centred tetragonal Fe–Pt nanoparticles embedded SiO2 films

Bulletin of Materials Science

关键词: fct Fe–Pt alloy nanoparticles;    Pt nanoparticles;    sol–gel SiO2 films embedded with nanoparticles;    nanocomposite films.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Chemically ordered face-centred tetragonal (fct) Fe–Pt alloy nanoparticles (NPs) embedded SiO2 films were synthesized on glass substrate by in situ hybrid sol–gel approach followed by heating at 450–900 °C in air and reducing (10% H2–90% Ar) atmospheres. Heat treatment of Fe/Pt co-doped films in air caused generation of Pt NPs first. At this stage, Fe remained in ionic state covalently bonded with silica network. Further heat treatment at 800–900 °C in reducing atmosphere facilitated the formation of uniformly dispersed fct Fe–Pt alloy NPs in amorphous SiO2 film matrix. The generated alloy composition was estimated by grazing incidence X-ray diffraction and TEM analysis to be Fe0.42Pt0.58 which is close to the nominal value.

【 授权许可】

CC BY