▎ 摘　　要

The nanocomposite (denoted as GR-AuNPs-CD-CS) of graphene (GR), gold nanoparticles (AuNPs), chitosan (CS) and beta-cyclodextrin (beta-CD) was prepared to modify a glassy carbon electrode. The as-modified electrode was explored for the ultrasensitive detection of dopamine (DA) and uric acid (UA). The modified electrode demonstrated linearly increased current response in the concentration range of 0.1-120 mu m for DA and 0.05-70 mu m for UA, with so far the best detection limit for DA and UA. Good stability and repeatability were further demonstrated for the as-made sensor.