Portable device integrating an ultrasensitive mechanical crack-based sensor for the wireless monitoring of cardiac activity

Nicolas de Pinho Ferreira , Etienne Puyoo (1) , Bertrand Massot , Solène Brottet , Christophe Malhaire

1 INL - Institut des Nanotechnologies de Lyon

Flexible crack-based strain sensors showing a maximum gauge factor of 30,000 at 0.2% strain level are elaborated by means of Atomic Layer Deposition and e-beam evaporation. It is shown that the mechanosensitivity can be drastically boosted by encapsulating the cracks with a photoresist layer. A non-invasive portable device integrating this ultrasensitive flexible transducer is then developed to monitor the cardiac activity at rest. The presented prototype integrates a Bluetooth Low Energy wireless interface for realtime communication with an Android mobile device.

Mots clés: Flexible technology; crack-based strain sensor; arterial-pulse sensor; Atomic Layer Deposition

Domaines: Sciences de l'ingénieur [physics]

Nicolas de Pinho Ferreira, Etienne Puyoo, Bertrand Massot, Solène Brottet, Christophe Malhaire. Portable device integrating an ultrasensitive mechanical crack-based sensor for the wireless monitoring of cardiac activity. 2020 Symposium on Design, Test, Integration & Packaging of MEMS and MOEMS (DTIP), Jun 2020, Lyon, France. pp.1-5, ⟨10.1109/DTIP51112.2020.9139156⟩. ⟨hal-03344474⟩