2D siloxene sheets: A novel electrochemical sensor for selective dopamine detection

In this work, a novel electrochemical sensor based on siloxene material is proposed for selective detection of dopamine (DA). We have prepared a two-dimensional silicon material called siloxene sheets via deintercalation of calcium from calcium disilicide (CaSi) and reviewed their electrocatalytic activity towards DA sensing. Characterization methods like X-ray diffraction, scanning electron microspore, transmission electron microscope, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller surface analyser were employed for analysing the material properties of the as-prepared siloxene. Electrochemical tests proved that the siloxene modified glassy-carbon electrode (siloxene/GCE) exhibited the excellent activity of dopamine detection. The fabricated electrode demonstrated a low detection limit of 0.327 μM with a wide linear range (10–190 μM; 200–1100 μM). The proposed sensor also showed excellent selectivity, stability, and reusability. This work suggests that the electrodes with siloxene based materials are promising for electrochemical sensors application.