Printed microfluidic sweat sensing platform for cortisol and glucose detection

Autor: Aditi R. Naik, Yiliang Zhou, Anita A. Dey, D. Leonardo González Arellano, Uzodinma Okoroanyanwu, Ethan B. Secor, Mark C. Hersam, Jeffrey Morse, Jonathan P. Rothstein, Kenneth R. Carter, James J. Watkins
Rok vydání: 2021
Předmět:
Zdroj: Lab on a chip. 22(1)
ISSN: 1473-0189
Popis: Wearable sweat biosensors offer compelling opportunities for improved personal health monitoring and non-invasive measurements of key biomarkers. Inexpensive device fabrication methods are necessary for scalable manufacturing of portable, disposable, and flexible sweat sensors. Furthermore, real-time sweat assessment must be analyzed to validate measurement reliability at various sweating rates. Here, we demonstrate a "smart bandage" microfluidic platform for cortisol detection and continuous glucose monitoring integrated with a synthetic skin. The low-cost, laser-cut microfluidic device is composed of an adhesive-based microchannel and solution-processed electrochemical sensors fabricated from inkjet-printed graphene and silver solutions. An antibody-derived cortisol sensor achieved a limit of detection of 10 pM and included a low-voltage electrowetting valve, validating the microfluidic sensor design under typical physiological conditions. To understand effects of perspiration rate on sensor performance, a synthetic skin was developed using soft lithography to mimic human sweat pores and sweating rates. The enzymatic glucose sensor exhibited a range of 0.2 to 1.0 mM, a limit of detection of 10 μM, and reproducible response curves at flow rates of 2.0 μL min
Databáze: OpenAIRE