TABLE II. Comparing the Thickness and Material of Each Layer With Respect to the Detection of Limit (LOD) of the SPR Sensor Used to Detect Viruses [51].
| Layer Structure | Layer Thickness | Target Virus* | LOD | References |
|---|---|---|---|---|
| Gold thin Film | 50 nm | Influenza Virus | 193.3 ng/mL | [52] |
| Gold thin Film | 50 nm | Dengue Virus | 0.08 pM | [53] |
| Gold thin Film | 50 nm | Ebola Virus | 0.5 pg/mL | [54] |
| Gold/Silver thin Film | 8/37 nm | Influenza Virus | 30 PFU/mL | [48] |
| Gold/Silver thin Film | 10/35 nm | Influenza Virus | 144 copies/mL | [49] |
| Platium-di-selenide/Gold thin Film | 2/48 nm | COVID-19 | 1.95 nM | [55] |