METHOD AND COMPOSITION FOR DISPERSIONS OF GOLD NANOPARTICLES

摘要

The present disclosure relates to a method for making a gold nanoparticle dispersion 100. The method includes providing a first solution 210 that has gold ions in a liquid medium 110, adding 220 NTA molecules to the first solution to form a gold nanoparticle dispersion 100. When the NTA molecules are added to the first solution, the NTA molecules act as a reducing agent to reduce the gold ions to gold atoms, after which the gold atoms nucleate to form gold nanoparticles 120. The excess NTA molecules 130 then attach to the surface of the gold nanoparticles to stabilize the dispersion. The present disclosure also relates to a dispersion composition 100 that includes a liquid medium 110, gold nanoparticles 120 dispersed throughout the liquid medium 110, and NTA molecules 130 directly coating the gold nanoparticles 120.