Layer-by-layer self-assembly of polyelectrolyte functionalized MoS2 nanosheets

Abstract

Few-layered polyelectrolyte functionalized MoS₂ nanosheets were obtained for the first time through in situ polymerization of MoS₂ nanosheets with poly(acrylic acid) and poly(acrylamide), both of which demonstrated excellent dispersibility and stability in water. After designing and optimizing the components of this series of polyelectrolyte functionalized MoS₂ nanosheets, by exploiting the electrostatic interactions present in the modified MoS₂ nanosheets, we further created a series of layer-by-layer (LBL) self-assembling MoS₂-based films. To this end, uniform MoS₂ nanosheet-based LBL films were precisely deposited on substrates such as quartz, silicon, and ITO. The polyelectrolyte functionalized MoS₂ nanosheet assembled LBL film-modified electrodes demonstrated enhanced electrocatalytic activity for H₂O₂. As such, they are conducive to efficient sensors and advanced biosensing systems.