Futao Kaneko

P2.2.4 Electrochemical-Surface Plasmon Resonance Sensor for the Detection of Adrenaline on Poly(2-aminobenzylamine) Thin Film

Catecholamines (CA) are molecules that have a catechol or 3,4-dihydroxylphenyl group and an ethylamine, which found in the sympathetic nervous system and response to mental stress. They include dopamine, adrenaline and noradrenaline. Development and optimization of methods for the high specific and selective determination of catecholamines are of important significance. In this research, poly (2-amino-benzylamine) (P2ABA) has been used to detect adrenaline. P2ABA is a polyaniline-based polymers, which has a good conductivity and stability when doping in neutral PBS solution. Furthermore, P2ABA has a benzylamine group in the structure which can specifically react with adrenaline and has a specific reaction site in the structure. The P2ABA thin film was prepared by electropolymerization of 2-aminobenzylamine monomer on a gold-coated high reflective index glass substrate. The P2ABA thin film formation on the gold electrode was studied by electrochemial surface plasmon resonance spectroscopy (EC-SPR) spectroscopy. QCM-D was also investigated for the specific reaction of adrenaline with the P2ABA thin film.

Polymer Ultrathin Films Via Alternate Self-Assembly Adsorption of Polyelectrolyte and Azo-Dye Molecules: Photo-Induced Alignment and Lc Display Properties

In this report, we describe the fabrication and photo-induced alignment of ultrathin films of small molecular azobenzene dyes and polyelectrolytes using the alternate polyelectrolyte deposition (APD) technique. The molecular self-assembly process were investigated by QCM, ellipsometry, UV-vis spectroscopy, X-ray reflectometry, and other surface sensitive spectroscopic and microscopic methods to correlate with film formation parameters. The importance of layer ordering and dye aggregation phenomena is emphasized. We then utilized polarized UV-light to induce photo-alignment of these ultrathin films and observed high anisotropies dependent on the dye, layer preparation and thickness. Fabrication of hybrid LC cells using a nematic LC reveal that in-plane homogeneous alignment is influenced by the anisotropy of the dye aggregates.