Abstract

Nanoparticles of 1–3 nm in radius were obtained from the reaction between Fe(acac)<inf>3</inf> and Pt(acac)<inf>2</inf> in the modified polyol process using two different solvents. The increase in surfactants (oleic acid and oleylamine) reduces the Fe:Pt ratio and increases the size of nanoparticles synthesized in dioctyl ether. In case of synthesis of benzyl ether, 2.5 mmol of each surfactants gave rise to uniform nanoparticles with hexagonal self-assembled pattern on a substrate whereas 5.0 mmol did not. Synchrotron small angle X-ray scattering profiles were fitted assuming a sphere form factor with a log-normal size distribution, using the least-squared minimization procedure. The average particle radii showed an increase with increasing surfactants from 2.5 to 5.0 mmol. The fitted log-normal size distributions also confirmed the effect of surfactant.