title: Molecularly imprinted polyaniline film for ascorbic acid detection.
abstract: Molecularly imprinted polyaniline (PANI) film (∼ 100 nm thick) has been electrochemically fabricated onto indium-tin-oxide (ITO) coated glass plate using ascorbic acid (AA) as template molecule. Fourier transform infra-red spectroscopy, scanning electron microscopy, cyclic voltammetry and differential pulse voltammetry (DPV) studies indicate the presence of AA in PANI matrix, which also acts as a dopant for PANI. Further, the AA selective molecularly imprinted PANI electrode (AA-MI-PANI/ITO) has been developed via over-oxidation of AA doped PANI electrode which leads to the removal of AA moieties from PANI film. The response studies using DPV technique have revealed that this molecularly imprinted AA-MI-PANI/ITO electrode can detect AA in the range of 0.05-0.4 mM with detection limit of 0.018 mM and sensitivity of 1.2 × 10(-5) AmM(-1). Interestingly, this AA-MI-PANI/ITO electrode shows excellent reusability, selectivity and stability.
authors.affiliation: Department of Science & Technology Centre on Biomolecular Electronics, National Physical Laboratory (Council of Scientific and Industrial Research), Dr. K.S. Krishnan Marg, New Delhi 110012, India.
authors.forename: Abani Kumar
authors.initials: AK
authors.lastname: Roy
authors.forename: V S
authors.initials: VS
authors.lastname: Nisha
authors.forename: Chetna
authors.initials: C
authors.lastname: Dhand
authors.forename: Bansi D
authors.initials: BD
authors.lastname: Malhotra
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D001205:Ascorbic Acid / Q000737:chemistry*; D004563:Electrochemistry; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D054802:Molecular Imprinting / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000814:Aniline Compounds; C416807:polyaniline; D001205:Ascorbic Acid