▎ 摘　　要

A surface plasmon resonance technique was used to systematically study the interaction of two dye molecules with graphene oxide (GO) and electrochemically reduced GO (EC-rGO) substrates. EC-rGO shows higher binding ability with both dyes than GO, possibly due to the molecular doping or pi-pi stacking. The results of SPR sensing are in agreement with the conclusions of fluorescence quenching experiments. This work may be valuable for graphene-related research work on optoelectronics and biosensors.