Title :
Detection of DNA by graphene-on-silicon FET structures simultaneously at DC and 101 GHz
Author :
E.R. Brown;W-D. Zhang;D. Neff;N.S. Green;M.L. Norton;P.H.Q. Pham;P.J. Burke
Author_Institution :
Department of Physics and Electrical Engineering, Wright State University, Dayton, OH 45435 USA
Abstract :
Two graphene-silicon field-effect transistor samples are characterized as a biological sensor of single-stranded DNA at DC and 101 GHz. In the first sample the 13-mer DNA is detected at DC and 101 GHz at three different molarities: 0.01, 1.0 and 100 nM. In the second sample it is so detected at only 1.0 nM but under progressive dilution by de-ionized water. In both cases, the mechanism for detection appears to be the same: (1) at DC it is the DNA-induced decrease in sheet conductance, and (2) at 101 GHz it is a correlated decrease in RF sheet conductance and the associated increase in 101-GHz transmission through the GFET acting as an optical etalon.
Keywords :
"Graphene","DNA","Silicon","Radio frequency","Sensitivity","Films","Substrates"
Conference_Titel :
Microwave Conference (EuMC), 2015 European
DOI :
10.1109/EuMC.2015.7345916
