Introduction
Experimental section
Materials
Co x Ni1−x nanoparticle synthesis
Co x Fe1−x nanoparticle synthesis
Alternating gradient magnetometer (AGM) measurements
Transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX)
Ultraviolet–visible (UV/Vis) spectroscopy
X-ray powder diffraction (XRD)
Results
Acetonation of cobalt carbonyl
Beneficial effect of cobalt carbonyl acetonation on nanoparticle alloy synthesis
Tunability of nanoparticle alloy composition
Magnetization of the particles
Batch | EDX Co (%) | TEM diameter (nm) polydispersity (%) | Average dipole moment (10−20 A m2) | Polydispersity of magnetic diameter (%) | Nanoparticle magnetization (kA m−1) |
---|---|---|---|---|---|
CoNi | 63 | 5.0 (16) | 4.6 | 38 | 700 |
CoNi | 83 | 4.7 (27) | 4.9 | 33 | 900 |
CoFe | 55 | 3.7 (27) | 2.1 | 30 | 380 |
CoFe | 90 | 5.2 (20) | 2.0 | 34 | 310 |