Electrochemical enantiorecognition of tryptophan enantiomers based on a multi-walled carbon nanotube–hydroxyethyl chitosan composite film

A novel chiral electrochemical sensor based on hydroxyethyl chitosan (HECS) covalently binding with the carboxylic multi-walled carbon nanotubes (MWCNT–COOH) was fabricated for discrimination of tryptophan (Trp) enantiomers.