Graphene-on-gold surface plasmon resonance sensors resilient to high-temperature annealing.

ABSTRACT: Gold films coated with a graphene sheet are being widely used as sensors for the detection of label-free binding interactions using surface plasmon resonance (SPR). During the preparation of such sensors, it is often essential to subject the sensor chips to a high-temperature treatment in order to ensure a clean graphene surface. However, sensor chips used currently, which often use chromium as an adhesion promoter, cannot be subjected to temperatures above 250 °C, because under such conditions, chromium is found to reorganize and diffuse to the surface, where it is easily oxidized, impairing the quality of SPR spectra. Here we present an optimized preparation strategy involving a three-cycle tempering coupled with chromium (oxide) etching, which allows the graphene-coated SPR chips to be

SUBMITTER: Jungnickel R 

PROVIDER: S-EPMC9829571 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature