A mechano-driven multi-ion sensor based on piezo- ionophoretic coupling for real time perspiration monitoring

Auteurs

KS A., Alluri N.R., Sharma K., Maria Joseph Raj N.P., Kim S.J.

Référence

Applied Materials Today, vol. 29, art. no. 101679, 2022

Description

Studying various electrolyte concentrations in body fluid plays a vital role in health monitoring. Presently body fluids are not explored well in health monitoring. At the same time, it consists of many biomarkers, including electrolytes, metabolite-proteins, antigens, and cytokines which can play an essential role in health monitoring. Inadequate material and unreliable power supply methods restrict its applications. In this work, a fully flexible Mechano-Driven Ion-Selective (MDIS) perspiration sensor was fabricated from a highly electroactive β-PVDF with a simple phase inversion method to address these issues. The prepared PVDF-based piezoelectric nanogenerator, attached on medical adhesive tape, gives an electrical output of ∼2.5 V and ∼10 nA under bending conditions and acts as the power source. The MDIS consists of an ionophores cross-linked polymer (ICP) that acts as a sensor for selective detection of ions in perspiration. This sensor quantitatively analyses potassium, and sodium contents in perspiration to the sensitivities of 0.024 mM−1, and 0.059 mM−1, respectively. The MDIS perspiration sensor response varied as a function of the concentration of the ions. This mechano-driven biosensor with enhanced stability, flexibility, sensitivity, and selectivity furnishes real-time monitoring of ion concentration levels during perspiration.

Lien

doi:10.1016/j.apmt.2022.101679