Accession Number : ADA623110


Title :   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


Descriptive Note : Final rept. 15 Apr 2014-14 Apr 2015


Corporate Author : BANGOR UNIV (UNITED KINGDOM)


Personal Author(s) : Campo, Eva


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a623110.pdf


Report Date : 01 Jul 2015


Pagination or Media Count : 4


Abstract : 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.


Descriptors :   *CHEMICAL BONDS , *FIELD EFFECT TRANSISTORS , *GRAPHENE , *GUANINE , *SPECTROSCOPY , *X RAY ABSORPTION ANALYSIS , CARBON , DYNAMICS , INTERFACES , LAYERS , POLYMETHYL METHACRYLATE , SILICON , SILICON CARBIDES , SPECTRA


Subject Categories : Physical Chemistry
      Electrical and Electronic Equipment
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE