The construction of well-aligned MWCNTs-PANI Langmuir-Blodgett film modified glassy carbon electrode and its analytical application

摘要

With the aid of polyaniline (PANI), multi-wall carbon nanotubes (MWCNTs) were vertically arrayed on electrode surface by Langmuir-Blodgett technology, which was a novel preparation strategy of vertically aligned MWCNTs modified electrode. The proposed method was applied to design a sensitive voltammetric sensor for the determination of daidzein. Compared to the randomly dispersed MWCNTs modified electrode, a lower detection limit (8 × 10~(-8) mol L~(-1)) and wider linear range (1.0 × 10~(-7)-9.0×10~(-6)mol L~(-1)) were achieved by the proposed sensor. The results indicated that the aligned morphology of MWCNTs could effectively facilitate the transportation of electrons and electrolyte ions.