In this study, a preparation of hollow nanoscale tubular polysulfide Co 9 S 8 is reported, along with its use in building an electrochemical sensor that can detect dopamine (DA). Utilizing electrochemically reduced graphene oxide (ErGO) as a substrate, the Co 9 S 8 -ErGO/GCE sensor was made by attaching Co 9 S 8 nanotubes to a glassy carbon electrode (GCE) surface. The use of ErGO in the sensor fabrication process not only improves the conductivity but also effectively prevents the aggregation of Co 9 S 8 . A large number of hollow Co 9 S 8 nan...
