Epidermal tattoo potentiometric sodium sensors with wireless signal transduction for continuous non-invasive sweat monitoring

A. J. Bandodkar, D. Molinnus, O. Mirza, T. Guinovart, J. R. Windmiller, G. Valdés-Ramírez, F.J. Andrade, M.J. Schöning, J. Wang. Biosensors and Bioelectronics 2014, 54, 603. doi: 10.1016/j.bios.2013.11.039

This article describes the fabrication, characterization and application of an epidermal temporary-transfer tattoo-based potentiometric sensor, coupled with a miniaturized wearable wireless transceiver, for real-time monitoring of sodium in the human perspiration.

Rubber-based substrates modified with carbon nanotubes inks to build flexible electrochemical sensors

M. Cuartero, J. Sabaté del Río, P. Blondeau, J. A. Ortuño, F. X. Rius, F. J. Andrade. Analytica Chimica Acta, 2014, 827, 95. doi: 10.1016/j.aca.2014.04.022

The development of a solid-contact potentiometric sensor based on conducting rubbers using a carbon nanotubes ink is described here. As a proof-of-principle, selective potassium electrodes are fully characterized giving comparable performances to conventional electrodes.