| abstract |
By applying a dry and freeform “cut-and-paste” method, an NFC-enabled wireless tattoo-like stretchable biometric sensor can be fabricated within minutes without using any chemicals, inks, or masks/stencils. This sensor is able to wirelessly receive power via a stretchable inductive coil and an NFC chip integrated on the sensor. Data measured by the sensor can be wirelessly transmitted via the same antenna and NFC chip. The sensor is fully stretchable and conformable to human skin and can follows the mechanical deformation of skin without mechanical and electrical failure or delamination. The sensor is imperceptible to wear and can perform high-fidelity sensing for physiological signals. Depending on where the sensor is applied, possible applications include measuring physiological signals such as skin thermography (body temperature), photometry (pulse oximetry, heartbeat), electrograms (ECG, EEG, EMG, EOG), electrical impedance (skin hydration, body fat) and mechanical motion (seismocaridogram, respiratory rate, joint bending). |