Abstract
Synthesis and characterization of gadolinium silicide nanoparticles prepared by pulsed laser ablation in ethanol were performed to clarify the capabilities of the laser ablation technique for preparation of stable nanoscale particles suitable to further biomedical applications. Experiments were made by using a 10-Hz double pulsed Nd:YAG laser, operating at 1064 nm. The formed colloids were examined by UV/vis absorption spectroscopy, transmission electron microscopy, scanning electron microscopy, and X-ray diffraction. Magnetic measurements showed that the resultant nanoparticles did not exhibit hysteresis at low temperature (6 K), which is typical to nanosized magnetic materials demonstrating superparamagnetic behavior. Higher purity Gd5Si4 sample with improved crystallinity was achieved by additional laser treatment of as-prepared colloids.
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