Interaction of gold and phthalocyanines nanoparticles generated by laser radiation in water

Experimental results are presented on the interaction of gold nanoparticles (NPs) generated by laser ablation in water and nanoparticles of copper and aluminum phthalocyanine (PC) obtained by laser fragmentation in water. Such particles are characterized by chemical purity, in contrast to NPs synthesized using other techniques. It is found that addition of either AlPC or CuPC colloidal solutions to colloid of Au NPs causes the aggregation of Au NPs. This is confirmed by evolution of extinction spectra of colloids mixture and by Transmission Electron Microscopy. This effect is not observed under addition of the colloid of AlPC to Ag NPs also generated by laser ablation in water. Addition of PC colloids to the mixture of Au and Ag NPs leads to selective aggregation of only Au NPs. Possible mechanisms of aggregation of Au NPs upon mixing with PC NPs that have the dzeta-potentials of different signs are discussed.

Automated summary

Experimental results show that the interaction between gold nanoparticles generated by laser ablation in water and nanoparticles of copper and aluminum phthalocyanine leads to the aggregation of gold nanoparticles. However, this effect is not observed when aluminum phthalocyanine is added to silver nanoparticles also produced by laser ablation in water.