KCS

This study shows oxygen plasma treatment effect of Au@AuHg alloy core-shell nanoparticle for the structural, localized surface plasmon resonance (LSPR) spectral, and surface Au atom distribution changes. Au@AuHg alloy nanoparticles subjected to different plasma treatment times were characterized using transmission electron microscopy (TEM) and total internal reflection scattering(TIRS) microscopy and spectroscopy. The mercury ion solution treatment for 3 hours changed AuNR to Au@AuHg alloy spherical particles, and the thickness and atomic ratio of the shell and core was confirmed through TEM. The AR of the single Au@AuHg alloy was decreased by structural deformation, while their LSPR linewidth was increased with increasing plasma treatment time. But the three-dimensional (3D) orientations of the particle showed non-variation tilt angles with oxygen plasma treatment . The results show that the shape of the AuHg alloy shell deformed close to spherical shape through oxygen collision, but did not induce deformation of the Au core in the process of the oxygen plasma treatment. Therefore, this study provides a deeper understanding of energy transfer distance by oxygen collision through plasma treatment of Au amalgam shell nanoparticles.