Ask a quation about washing off the surfactant on the nanocrystals' surfaces?

10 January 2019 1 8K Report

I had prepared some polyhedral alloy nanocrystals by using PVP( Polyvinyl pyrrolidone ),then washed them by using water and

ethyl alcohol for several times. But a layer of PVP was found adsorbed on the nanocrystals' surface under the SEM. How to wash it completely?

Titus Sobisch

PVP is not a surfactant. Maybe you can remove it only by oxidation. Depending on chemistry of nanocrystals variation of pH might also help.

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