1. Bio-molecules (ex. DNA , protein, anti-body or anti-gen) can be immobilized on the Au nanoparticles by surface modified. It can detect the gene defect and virus analysis.

2. Au nanoparticles can be immobilized on the surface of bio-sensor (ex. glass, metal or polymer). This kind of bio-sensor can enhance the analysis sensitive of instrument.

3. Au nanoparticles can be filled on the pore of the surface of electric connector. It can improve the reliability and LLCR (Low level contact resistance).