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At the heart of the NanoAffix Lead Testing System is an electronic sensing platform effective in the detection of various contaminants in water, such as heavy metal ions, bacteria, and nutrients.

The sensor is based on the working principle of the graphene conductivity changing with the chemical binding of analytes to the surface. Therefore, the presence of the contaminants can be determined by measuring the sensor resistance change. Preliminary results have shown that the sensors can detect ions as low as 0.2 ppb, well below the maximum contaminant level (MCL) defined by the EPA of 15 ppb for lead 15 ppb. Most importantly, the platform responds to lead in seconds, which is promising for real-time monitoring of water quality.

The utilization of nanotechnology and graphene provides advantages of other devices. For example, it enables a robust and simple device structure, and rapid, sensitive, selective detection. This breakthrough technology allows real-time detection with minimal sample preparation and unprecedented sensitivity and specificity in field settings (outside a laboratory facility) for single point testing (e.g., handheld device) as well as for continuous monitoring (e.g., integrated into existing water equipment).

Graphene is an atomic-scale honeycomb lattice made of carbon atoms.

Graphene, a single layer of carbon atoms packed into a two-dimensional honeycomb lattice, is a promising electronic nanomaterial due to its unique structure and electronic properties. Intrinsic graphene is a zero-gap semiconductor that has remarkably high electron mobility (100 times greater than that of silicon), making it attractive for sensitive, high-speed chemical/biological sensors due to its high sensitivity to electronic perturbations.

In addition, due to its large specific surface area, graphene is an ideal substrate for high density loading of target chemical probes, which promises both a low detection limit and a broad detection range for the sensor. Graphene can be obtained through various physical and chemical routes. A potential method to cost-effectively mass produce graphene-based devices is to first produce graphene oxide and then thermally reduce it to obtain reduced graphene oxide for device applications.

Invest in NanoAffix

Don’t miss out on the opportunity to invest in this cutting-edge technology as NanoAffix actively seeks Series A funding to get this exciting new technology into the hands of as many people as possible for water quality monitoring.