Optical applications: Gold nanoparticles have obvious surface plasmon resonance properties, which can manipulate the absorption, scattering and propagation behavior of light. Therefore, nanogold dispersions have potential applications in optical devices, such as optical sensors, optoelectronic devices and photocatalysis.

Molecular detection and analysis: Gold nanoparticles in nanogold dispersions have a strong surface enhanced Raman scattering effect, which can enhance the Raman spectral signal of molecules. This technology is widely used in molecular detection and analysis with high sensitivity and selectivity.

Catalyst: Nanogold dispersions can be used as efficient catalysts in chemical synthesis reactions. The high surface area and special surface activity of gold particles can promote the reaction rate, and can also regulate the selectivity and reaction path of the catalytic reaction.