One-step aqueous synthesis of stoichiometric Fe–Cu nanoalloy

• Published in: Materials letters Vol. 62; no. 26; pp. 4195 - 4197
• Main Authors: Morales-Luckie, Raul A, Sanchez-Mendieta, Victor, Arenas-Alatorre, Jesus A, Lopez-Castanares, Rafael, Perez-Mazariego, Jose L, Marquina-Fabrega, Vivianne, Gomez, Raul Wayne
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.10.2008
• Subjects: Electron microscopy; Metals and alloys; Microstructure; Mössbauer spectroscopy; Nanomaterials; Nanomaterials; Metals and alloys; Microstructure; Electron microscopy; Mössbauer spectroscopy
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2008.06.039

Fe 50 − x Cu 50 − x B 2 x alloy was obtained by an aqueous chemical reduction at pH = 7.0, using fast and slow NaBH 4 solution addition methods. According to X-ray diffraction patterns, TEM and HRTEM observations, smaller than 10 nm nanocrystals of fcc-FeCuB were formed when the fast method was employed. The room temperature Mössbauer spectrum of this FeCuB nanoalloy shows a quadrupole doublet with an isomer shift of 0.355(1) mm/s and a quadrupole splitting of 0.772(2) mm/s, and a broadened magnetic sextet with a quadrupole splitting of 0.020(3) mm/s and an isomer shift of 0.436(5) mm/s, exhibiting a distinctive high average magnetic field of 40.57(5) T. Grains with a size larger than 10 nm were obtained for a slow method nanoalloy, and its Mössbauer spectrum consisted only of a broadened sextuplet characteristic of an fcc-FeCuB alloy.