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Laser-induced graphene interdigitated electrodes for label-free or nanolabel-enhanced highly sensitive capacitive aptamer-based biosensors

Yagati, Ajay Kumar ; Behrent, Arne ; Beck, Sebastian ; Rink, Simone ; Goepferich, Achim M. ; Min, Junhong ; Lee, Min-Ho ; Baeumner, Antje J.



Abstract

Highly porous laser-induced graphene (LIG) is easily generated in complex electrode configurations such as interdigitated electrodes (IDEs). Here, we demonstrate that their superior capacitive response at low frequencies can be exploited in affinity biosensors using thrombin aptamers as model biorecognition elements. Of specific interest was the effect of electrode surface area on capacitance ...

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