Colloidal sphere-like gold nanoparticles were prepared from an HAuCl 4 aqueous solution by the
chemical reduction method and by using X-ray irradiation, while rod-like gold nanoparticles were
synthesised according to the seed-mediated growth method and by sonoelectrochemistry. Gold nanoparticles
exhibit fcc structure. Sphere-like gold nanoparticles have a diameter of 20-60 nm, while rod-like gold
nanoparticles have an aspect ratio of 2-4. In UV-vis spectra, the absorption bands related to surface plasmon
resonance were observed. Co-Pt nanoparticles of 5-20 nm were prepared by electrochemistry, while Fe-Pt
nanoparticles with a size of 5-10 nm were prepared by sonoelectrochemistry. After annealing, these
magnetic nanoparticles showed a high coercivity. The gold nanoparticles were functionalised for detecting
breast cancer cells.
