
| Comparison of SPR Characteristics between Gold and Silver | ||
| Characteristics | Gold (Au) | Silver (Ag) |
| Resonance wavelength | Visible to near-infrared region (~520 nm and above) | Visible light region (~400 nm) |
| Resonance intensity | Strong, but slightly lower than silver | Stronger, with higher electric field enhancement effect |
| Chemical stability | High, strong oxidation resistance | Low, easy to oxidize (easy to form an oxide layer on the surface) |
| Biocompatibility | High, often used in biosensors | Low, easy to react with biological molecules |
| Application areas | Biosensors, medical diagnosis, optoelectronic devices | High-sensitivity sensing, surface-enhanced Raman scattering |



