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.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Guiqiang Wang and Liang Huang
Appl. Opt. 61(3) 683-690 (2022)
Sherif H. El-Gohary, Jong Min Choi, Nak-Hyeon Kim, and Kyung Min Byun
Appl. Opt. 53(10) 2152-2157 (2014)
Seung Ho Choi, Young L. Kim, and Kyung Min Byun
Opt. Express 19(2) 458-466 (2011)