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

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 .