| AuNPs | Gold nanoparticles |
| POCT | Point-of-care testing |
| SARS-CoV-2 | Severe acute respiratory syndrome coronavirus 2 |
| RSV | Respiratory syncytial virus |
| RT-qPCR | Real-time reverse transcription quantitative polymerase chain reaction |
| N | Nucleocapsid |
| Kd | Dissociation constant |
| BSA | Bovine serum albumin |
| ddH2O | Double-distilled water |
| IPTG | Isopropyl β-D-1-thiogalactopyranoside |
| LB medium | Luria–Bertani medium |
| PBS | Phosphate-buffered saline |
| eGFP | Enhanced green fluorescent protein |
| b-F | Biotin-fluorescein |
| A530 | Absorbance at 530 nm |
| A560 | Absorbance at 560 nm |
| DLVO | Derjaguin–Landau–Verwey–Overbeek |