Microwavw Solution Sythesis and Characterization of SnO2 nanocrystallites

Semiconductor nanocrystallites exhibit size dependent properties due to quantum confinement effect that are not present in their bulk counterparts. In this work, high-purity of extremely small powders of SnO2 nanocrystallites with crystallite sizes ~1.1 have been synthesized by a solution process, in which amorphous precipitate of Sn+4 is crystallized with microwave heating. The particles size varied from ~1.1 to 2.7 nm. Based on XRD analyses, the particle size, crystal structure and parity of samples are realized. UV-Vis measurement showed that, for SnO2 nanocrystallites, excitonic peaks are obtained ~237, 250 and 279 nm corresponding to ~1.1, 2 and 2.7 nm sizes respectively. STM analyses showed that, the nanocrystallites are highly monodisperse of spherical shape.