  Nanoscale engineered materials combined with wearable wireless technologies
can deliver a new level of health monitoring. A reduced graphene oxide-nylon
composite material is developed and tested, demonstrating its usefulness as a
material for sensors in wearable, long-term electrocardiogram (ECG) monitoring
via a comparison to one of the widely used ECG sensors. The structural analysis
by scanning electron (SEM) and atomic force microscopy (AFM) shows a limited
number of defects on a macroscopic scale. Fourier Transform Infrared (FTIR) and
Raman spectroscopy confirm the presence of rGOx, and the ratio of D- and
G-features as a function of thickness correlates with the resistivity analysis.
The negligible effect of the defects and the tunability of electrical and
optical properties, together with live ECG data, demonstrate its signal
transduction capability.
