Nucleation single burst

Nucleation occurs in a single burst, and consiunes a very small amount of the limiting reagent... 

Alternatively, supersaturation and nucleation can be triggered by a slow ramping of the reaction temperature. Precursors are mixed at low temperature and slowly brought to the temperature at which precursor reaction and decomposition occur sufficiently quickly to result in supersaturation." Supersaturation is again relieved by a nucleation burst , after which temperature is controlled to avoid additional nucleation events, allowing monomer addition to existing nuclei to occur more rapidly than new nuclei formation. Thus, nucleation does not need to be instantaneous, but it should be a single, temporally discreet event to provide for the desired nucleation-controlled narrow size dispersions. ... 

The nuclei formed then grow by diffusion. An important condition needed for the formation of monodispersed particles is single act of nucleation, i.e. that no secondary burst of nuclei occurs. For this condition to be fulfilled, the newly formed molecular species of sulfur should be forming at such a rate that their diffusional transport to the already fonned solid particles, rather than secondary acts of nucleation take place. 

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