Abstract
A simple, organic solvent free ultrasonic exfoliation method was developed to produce exfoliated SnS 2 nanoplates of an average size of 24 nm and thickness of 8 nm. These SnS 2 nanoplates were decorated onto the surfaces of multi-walled carbon nanotubes (MWCNT) to serve as the sensing electrode for glucose oxidase (GOx) based direct electron transfer sensing of glucose. The decoration of exfoliated SnS 2 nanoplates significantly improved hydrophilicity of the electrode and the electron transfer micro-environment between the redox-active site of GOx and the electrode surface, both beneficial to the direct electron transfer sensing of glucose. A high sensitivity of 28.9 μA/mM cm 2 was achieved, 1.77 times that of the SnS 2 -free case and among the highest reported for CNT and GOx based direct electrochemical glucose sensing.