THE CHALLENGE
Conventional potentiometric ion selective sensing technologies used in point of care diagnostics and wearable health monitoring face limitation rooted in their reliance on strict thermodynamic equilibrium measurements. Solid contact ion selective electrodes, often based on redox active conducting polymers, exhibit persistent baseline drift, hysteresis, and interfacial instability caused by charge trapping, surface fouling, and uncontrolled faradaic processes. In practical deployment within complex biological fluids such as sweat, milk, and blood, these effects lead to poor cross device reproducibility and frequent recalibration requirements, increasing operational cost and limiting scalability. Because existing systems treat transient electrochemical responses as noise, they fail to utilize rich dynamic information that could improve diagnostic accuracy and state awareness. This results in significant barriers to commercialization in continuous monitoring markets, where reliability, low power operation, and long-term stability are essential. The absence of robust interfacial architectures capable of managing both equilibrium and transient behavior constrains adoption in healthcare and agricultural diagnostics.
OUR SOLUTION
Our electrochemical transducer turns a common challenge in pH sensing into an advantage by using a gold patterned substrate and an oxygen enriched graphene layer to store a tiny voltage memory that can be written, held and read without any redox chemistry. The device is manufactured on a polymer base with a simple lithography free process, keeping material cost low and allowing volume production on printed circuit board lines. The built in proton selective membrane and a protected silver chloride reference give near Nernstian response while the capacitive charge retention creates a reliable history dependent signal that can be decoded with our cloud-based machine learning service. This combination delivers a sensor platform that offers higher accuracy, reduced drift and the ability to track dynamic changes in biofluids, opening revenue streams in medical diagnostics, food safety and wearable health monitoring. Customers can purchase the hardware once and subscribe to data analytics, creating recurring revenue and a return on investment.
Figure: Conceptual rendering of the hierarchically structured graphene interface illustrating distributed ion–electron coupling and spatially extended EDL charge storage that underpins reversible electrostatic state programmability.
Advantages:
Potential Application: