Surface-Modified CNT-Based Nanocomposite Sensor for Biological Signal Recording

Here we report a soft and stretchable surface-modified carbon nano tube (CNT)/silicone oil (SO)/polydimethylsiloxane (PDMS) sensor for biological signal recording. Silver nano particles were used to modify the surface of the sensor, improve its interface with the skin and reduce electrode-skin interface impedance (ESII). Our results show that adding a layer of silver nanoparticles at sensor surface decreases the ESII by 30% and increases the signal-to-nose ratio (SNR) from 21 dB to 29 dB. The sensor is easy to apply, comfortable to wear and reusable and it was fabricated using our developed scalable, time-and-cost-effective method.