Fig. 4: Norfentanyl sensing using a portable experimental setup.
From: Detection of opioids and their metabolites in sweat by carbon nanotube FET sensor array
a A portable potentiostat for FET measurement. b Sensor configuration. SEM images show NOR-ab immobilized on the Au gate electrode (left) and SWCNTs deposited between the interdigitated electrodes (right). c FET characteristic curve of norfentanyl sensing using the portable setup. d Calibration plot for norfentanyl using the portable setup. The concentration of norfentanyl indicated on x-axis is plotted on a logarithmic scale.
