Studies by Near Edge X-ray Absorption Spectroscopies of Bonding Dynamics at the Graphene/Guanine Interface - A Proposal for High Mobility, Organic Graphene Field Effect Transistors.

摘要

This project was a study of DNA-based polymers (specifically guanine) as gate dielectrics in organic FETs, to examine the molecular arrangement of guanine on graphene via synchrotron spectroscopy. 1 and 4 ML graphene samples stamped on Silicon Carbide (SiC) were examined using two possible substrate terminations. The result showed that CVD-grown graphene transferred to SiC substrates seems electronically healthy; the choice of substrate termination makes little difference to the 4ML graphene but 1ML graphene most closely resembles native graphene on SiC when used with the Siterminated surface. Structural and chemical analysis suggest healthy dielectric epilayers, suggesting further exploration.