Abstract
In order to get highly monodispersed nanoparticles, a post-synthesis separation of nanopaticles polydisersed in size and shape is often desired, although the experimental conditions for the synthesis of nanoparticles are carefully controlled. Using continuous density gradient centrifugation, Ag nanospheres, nanocubes, and nanowires can be separated from polydisperse samples. Size and dimension analysis by sanning electron microscopy and absorption spectroscopy prove that density gradient centrifugation is a powerful method to obtain monodisersed nanoparticles.
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