The Office of the Vice President for Research is pleased to host the next John P. Oliver, Nano@Wayne Seminar on Tuesday, February 12, 2013 at 2:30 p.m. at the Welcome Center Auditorium. The speaker for this seminar will be Dr. Mark Cheng, Assistant Professor at Wayne State University. The title of his presentation will be: "Graphene-Based Bioelectronics".
Graphene is a flat single atomic layer of sp2 bonded carbon atoms that are packed in a honeycomb lattice. In recent years, graphene has been discovered to own exceptional electronic, mechanical and chemical properties. First, graphene has exremely high surface area, where absorbed chemical and biomolecules can be effectively translated into electrical signals by changing its conductivity. Second, graphene has extremely low carrier concentration around Dirac point, making it ideal for the detection of single biological molecules. In addition, graphene has high optical transparency, excellent mechanical properties (maximum strain, 12%) and high conductivity. Reversible contact angle changes were observed on Teflon-coated graphene electrodes with both AC and DC voltages. This phenomenon (known as electrowetting on dielectric) enables the manipulation of biological samples using graphene electrodes. Compared to other electrodes (such as gold and indium tin oxide), we observe robust electrowetting on graphene, including reproducibility and high breakdown voltage. These unique features make graphene attractive in sensitive label-free detection for future point-of-care devices.
A small reception will follow (3:30-4:00) in the Welcome Center Lobby.
Please note: Parking is available in Parking Structure No. 6, which is on Putnam between Cass and Woodward. Enter by the visitors gate, take a receipt and bring it to the Welcome Center Nano@Wayne registration desk to be validated.