CNT-based electrochemical biosensors for the detection of SARS-CoV-2.

CNT-based electrochemical biosensors
Recognition element	LOD	Reference
S protein	—	56
RNA	10 fM	124
ROS	—	126
Spike (S)-antigen (SAg)	0.55 fg ml−1	130
Nucleocapsid (N)-antigen (NAg)	0.016 fg ml−1	130
S protein	—	138
Viral RNA	—	139
S protein	4.12 fg ml−1	137