Sol-immobilization is a method used to create supported metal nanoparticles (NPs) with controlled size and shape, leading to a narrow size distribution.
Advanced X-ray absorption fine structure (XAFS) techniques provide precise structural information on gold (Au) nanoparticles in dilute solutions (μM concentrations).
The study finds that temperature adjustment can tune the size of Au colloids, Au concentration has minimal impact on average particle size in solution, and the immobilization process significantly increases particle size, particularly at higher concentrations, enhancing material optimization for catalytic uses.