Graphene sensor upgraded with reservoir for biosensing
Graphenea in Spain has upgraded its mGFitsET line of graphene-based sensors with a built-in reservoir for liquids.
This boosts the use of the graphene sensor in biosensing and implementations in clinical testing and rapid screening.
The mGFET has passivated metal contact pads to avoid degradation and reduce leakage currents. The product comes in two versions: mGFET-4D with high-K dielectric passivation, and mGFET-4P with polymer passivation. The passivation has been tested against common solvents such as acetone and DMF, showing good chemical stability.
The chip also includes a non-encapsulated electrode at the chip center, allowing for liquid gating without the need of an external gate electrode. This device architecture enhances signal-to-noise ratio and reduces parasitic effects.
The mGFET line was launched alongside a socket for housing the mGFET and interfacing with measurement electronics. The addition of the built-in reservoir lets developers focus on the biochemistry, without worrying about producing the graphene or the sensor, or about interfacing.
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