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With the aids of SEM,XPS measurements,localized plasmon resonance light scattering(PRLS) spectrometry and light scattering imaging,investigations on the amalgamation process of both cetyltrimethylammonium bromide(CTAB) and citrate-coated gold nanoparticles(AuNPs) in the presence of Hg2+ showed that the Au-Hg amalgam process of gold nanoparticles is surface coating dependent in aqueous medium,and the scattering light color change of AuNPs under a dark-field microscope is blue-shifted from red-orange into yellow-orange or even yellow.The former one involves the reduction of Hg2+ to Hg0 species and adsorption of Hg0 on the surfaces of AuNPs,while the later one indicates the shape-evolution of AuNPs.
With the aids of SEM, XPS measurements, localized plasmon resonance light scattering (PRLS) spectrometry and light scattering imaging, investigations on the amalgamation process of both cetyltrimethylammonium bromide (CTAB) and citrate-coated gold nanoparticles (AuNPs) in the presence of Hg2 + + + that the Au-Hg amalgam process of gold nanoparticles is surface coating dependent in aqueous medium, and the scattering light color change of AuNPs under a dark-field microscope is blue-shifted from red-orange into yellow-orange or even yellow. one involves the reduction of Hg2 + to Hg0 species and adsorption of Hg0 on the surfaces of AuNPs, while the later one indicates the shape-evolution of AuNPs.