Scalable graphene field-effect sensors for specific protein detection

We demonstrate that micron-scale graphene field-effect transistor biosensors can be fabricated in a scalable fashion from large-area chemical vapor deposition derived graphene. We electrically detect the real-time binding and unbinding of a protein biomarker, thrombin, to and from aptamer-coated graphene surfaces. Our sensors have low background noise and high transconductance, comparable to exfoliated graphene devices. The devices are reusable and have a shelf-life greater than one week.

Grant Saltzgaber, Peter Wojcik, Tal Sharf, Matthew R Leyden, Jenna L Wardini, Christopher A Heist, Adeniyi A Adenuga, Vincent T Remcho and Ethan D Minot

Click for full article