3 years ago

Hall effect biosensors with ultraclean graphene film for improved sensitivity of label-free DNA detection

Hall effect biosensors with ultraclean graphene film for improved sensitivity of label-free DNA detection
The quality of graphene strongly affects the performance of graphene-based biosensors which are highly demanded for the sensitive and selective detection of biomolecules, such as DNA. This work reported a novel transfer process for preparing a residue-free graphene film using a thin gold supporting layer. A Hall effect device made of this gold-transferred graphene was demonstrated to significantly enhance the sensitivity (≈ 5 times) for hybridization detection, with a linear detection range of 1pM to 100nM for DNA target. Our findings provide an efficient method to boost the sensitivity of graphene-based biosensors for DNA recognition.

Publisher URL: www.sciencedirect.com/science

DOI: S095656631730492X

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