Table 1 Comparison of various sensors for cortisol with respect to substrates, buffer media, linear range and detection limit.
From: Portable biosensor for monitoring cortisol in low-volume perspired human sweat
Substrate | Detection method | Buffer media | Dynamic range | Detection limit | Ref. |
|---|---|---|---|---|---|
Au nanowire | Square wave voltammetry | PBS | 3.7–12 µg/mL | 3.7 µg/mL | |
Immune-chromatographic strip | Immuno-chromatography | PBS | 1–10 ng/mL | 1 ng/mL | |
Disposable disc-chip (acrylic resin) | Immuno-chromatography | Saliva | 0.4–11.3 ng/mL | 0.4 ng/mL | |
SAM modified microfabricated interdigitated Au electrodes | Cyclic voltammetry | PBS | 3.6 pg/mL –36 ng/mL | 3.6 pg/mL | |
Zinc oxide on flexible nanoporous membrane | Electrochemical Impedance Spectroscopy | Human sweat | 10–200 ng/mL | 1 ng/mL | |
MoS2 Nanosheet on flexible nanoporous membrane | Electrochemical Impedance Spectroscopy | Human sweat | 1–500 ng/mL | 1 ng/mL | This work |
