Fig. 18.

a Illustration for the presumed cortisol transdermal sweat monitoring prototype device. b SEM images of polyamide substrate before and after MoS₂ coating. c Schematic representation of the prepared MoS₂-based cortisol sensor d EDAX spectra. Source: Kinnamon, David, Ghanta, Ramesh Lin, Kai Chun Muthukumar, Sriram Prasad, Shalini- Portable biosensor for monitoring cortisol in low-volume perspired human sweat, Scientific Reports,7(2017),1–13,10.1038/s41598-017-13684-7, http://creativecommons.org/licenses/by/4.0/