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mixed sodium stannate with fourth-generation dendrimers of either poly(amidoamine) or poly(propyleneimine). They then bubbled CO2 into the aqueous or ethanolic solutions, and particles with a diameter of 3 nm formed within 30 minutes. Author notes that, unlike other metal oxide nanoparticle syntheses, his lab s procedure doesn t require elevated temperatures or involve moisture-sensitive reagents. The researchers also found that substituting cheaper hyperbranched poly(ethyleneimine) polymers for the costly dendrimers yields similar results.



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