Size control of L1_2-FePt-3 nanocrystals by spin-coating method

Annealing is one of the stages of fept nanoparticles preparation, during which the transition to a compositionally ordered phase occurs. in order to size and shape control of the nanoparticles in the mentioned stage, it is needed that they be distributed on a suitable surface. in the present work, the spin-coating method is suggested for preparing monolayer from l1_2-fept_3 nanoparticles colloidal solution on sio_2/si substrates. fept3 nanoparticles were gradually deposited as droplets on the center of a 500 rpm rotating substrate. this step was performed in hexane vapor atmosphere without any stopping time. the analyses revealed that a uniform surface distribution was formed so that, after annealing at 600 °c for 1 h the 6.1 nm l1_2-fept-3 nanoparticles were spherical in shape with standard deviation of 1.5 nm.