Conducting polymer modified electrodes and their applications as biomembranes and gas sensing materials.

摘要

My research involves three major projects. The first project focused on the study and characterization of conductive polymer polypyrrole modified electrodes as biomembrane for drug delivery. We have developed a method to make a highly stable polypyrrole (PPY) nanoparticle film. The PPY nanoparticle film was thoroughly characterized for the doping and undoping of amino acids, small peptides and insulin using electrochemical (i.e. electrochemical crystal microbalance (EQCM), electrochemical impedance spectroscopy (EIS)) and spectroscopy techniques (i.e. FT-IR, UV-Vis). The long term goal of this study is to provide the fundamental understanding needed to facilitate the design of an innovative insulin delivery system for diabetes patients.The second project focused on the study and the development of conducting polymer modified electrode as gas sensors. I systematically investigated various redox states of conducting polymer polyvinyl ferrocene and their effects on the gas sensing properties for various important environmental gases and volatile organic compounds by using QCM transducers. Additionally, I used both electrochemical and spectroscopic techniques to characterize the PVF and ionic liquid composites as gas sensing materials to further enhance the sensitivity and specificity for their use for gas detection.The third project focused on development of saccharide-conjugated conducting polymer via a "Schiff base-like" reaction. The polyaniline (PANI) conjugated carbohydrate modified electrodes were studied for use in biosensor and biomembrane applications.