Smart Sensor Patch with Wireless Strain & Temperature Sensors & Batteryless NFC Tag

This video shows a flexible patch or smart bandage consisting of strain and temperature sensors and a batteryless Near Field Communication tag. Both sensors are based on conductive poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) polymer. The highly sensitive strain sensor is developed with a microfluidic channel filled with PEDOT:PSS in soft Polydimethylsiloxane (PDMS). The strain sensor shows 3 order (~1250) increase in the resistance for 10% strain and considerably high gauge factor (~12500). The resistive temperature sensor, fabricated on a Polyvinyl Chloride (PVC) substrate, shows a ~60% decrease in resistance for temperature varying from 25 to 85⁰C and a sensitivity of ~1% per ⁰C. The video shows a proof of concept device with sensors and NFC tag integrated on wound dressing to show its suitability for wearable systems. The sensors can be operated and read from distance of 25 mm with a user-friendly smartphone application (SensAble) - developed by BEST group to power the system as well as to acquire the data in real-time. The videos also shows the potential use of smart bandage in health applications - assessment of respiratory diseases such as asthma and COVID-19, where monitoring via wearable strain (e.g. respiratory volume) and temperature sensors is critical. This video was prepared as part of paper "Smart Bandage with Wireless Strain and Temperature Sensors and Battery-less NFC Tag" published in IEEE Internet of Things Journal. The paper can be accesses using DOI: 10.1109/JIOT.2020.3048282.

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