title: Effect of coupled graphene oxide on the sensitivity of surface plasmon resonance detection.
abstract: We investigated graphene-oxide-(GO-) coupled surface plasmon resonance (SPR) detection sensitivity for sandwiched antigen-antibody interaction between human and antihuman immunoglobulin G molecules. GO was prepared in a Langmuir-Blodgett solution on gold and dielectric surfaces. Theoretical and experimental data suggest that an increased dielectric spacer thickness reduces resonance shifts for GO-coupled SPR detection as dielectric properties of GO appear to prevail. In general, a metal-enhanced structure was shown to provide a larger resonance shift by plasmonic field enhancement. The far-field properties were described in terms of near-field overlap. The peak resonance shift that was obtained with GO-coupled SPR detection was enhanced to 113% of the resonance shift obtained by conventional thin-film-based SPR detection and may further be improved by GO stacking.
authors.forename: Yeonsoo
authors.initials: Y
authors.lastname: Ryu
authors.forename: Seyoung
authors.initials: S
authors.lastname: Moon
authors.forename: Youngjin
authors.initials: Y
authors.lastname: Oh
authors.forename: Yonghwi
authors.initials: Y
authors.lastname: Kim
authors.forename: Taewoong
authors.initials: T
authors.lastname: Lee
authors.forename: Dong Ha
authors.initials: DH
authors.lastname: Kim
authors.forename: Donghyun
authors.initials: D
authors.lastname: Kim