Why does a common surfactant such as CTAB bond to metal nanoparticles (such as Ag and Au)?

10 January 2014 1 7K Report

If I have both metal nanoparticles (Ag/Au) and oxide particles such as TiO2 and SiO2 in water solvent. Will surfactant CTAB selectively bond to metal nanoparticles or not?

Torbjörn Pettersson

SiO2 and TiO2 NPs will also be charged and there will not be any selectivity for the CTAB and the different NPs. There might be a larger van Deer Waals interaction between CTAB and MNPs compared to the oxides.

Finally if you have a mixture of the NPs I would say that CTAB adsorb on both the MNPs and the oxideNPs.

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