Comparison of our strategy with other previously reported cTnI biosensors.

Detection method	Detection limit	Linear range	Ref.
Silicon nanowire biosensors	0.005 ng mL−1	—	21
Fluoro-microbead guiding chip	1 ng mL−1	0.1–100 ng mL−1	14
Electrochemiluminescence immunosensors	0.002 ng mL−1	0.0025–10 ng mL−1	22
Optomagnetic biosensors	0.03 ng mL−1	0.03–6.5 ng mL−1	25
Nanoelectrode arrays	0.2 ng mL−1	0.1–100 ng mL−1	23
Electrochemical biosensors	0.04 ng mL−1	0.5–100 ng mL−1	This sensor