Paint the Town Red Incorporation of Direct Red 80 into Self-Assembled and Spin-Assembled Polyelectrolyte Multilayers

Date of Award

2003

Document Type

Thesis

Degree Name

Bachelors

Department

Natural Sciences

First Advisor

Johal, Malkait

Keywords

Polyelectrolyte, Direct Red 80/Multilayers, Polymers, Azobenzene

Area of Concentration

Chemistry

Abstract

The focus of this thesis is to investigate the sequential adsorption of charge alternating polymer and dye layers onto a solid support. In addition to investigating adsorption of an anionic dye onto a polycationic surface, competitive adsorption of the dye and an anionic polyelectrolyte onto a polycationic surface is also studied. Adsorption kinetics of each species and the composition of the mixed film is investigated. The layers are constructed using both layer-by-layer self-assembly and spin-assembly. The two deposition techniques differ in substrate-solution contact time, with the latter technique resulting in films far from thermodynamic equilibrium. T'he multilayers are characterized using UV-visible spectrophotometry, ellipsometry, and atomic force microscopy. It was found that it is possible to spin-assemble small monomeric molecules onto a cationic polyelectrolyte. It was found that coadsorption of two anionic species on the cationic surface occurs using both assembly methods.

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