Date of Award

5-22-2025

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Chemistry

First Advisor

Noureen Siraj

Abstract

Material science is dedicated to understanding the properties, structures, and applications of materials. It plays a pivotal role in advancing new technologies and innovations across a wide range of fields, including energy, electronics, environmental solutions, healthcare, and more. This dissertation is focused on the ionic materials for environmental sensors and flexible electronics. The first part of this dissertation focuses on the environmental applications of ionic materials for detecting contaminants in water, soil, and harmful gases. In this study, ionic materials and their nanoparticles are thoroughly investigated for their ability to detect nitroaromatic compounds and sulfur dioxide (SO₂) gas. By selecting an optimal solvent and synthesizing ionic nanoparticles, the sensitivity and selectivity of these materials are enhanced. These enhancements are examined using UV-Vis spectrophotometry and fluorescence spectrometry. Additionally, the mechanisms behind these enhancement strategies are discussed in detail. The second part of this dissertation focuses on the synthesis and characterization of ionic materials for flexible electronics. Ionic liquids (ILs) are well-known for enhancing the electrical performance and elasticity of the conductive polymer, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The cations and anions in ILs play a crucial role in the conductivity and stretchability of PEDOT:PSS. This study investigates the counter-ion effects of ILs to understand their enhancement strategies for PEDOT:PSS. By exploring the optimal combination of ILs, the development of flexible electronics is further advanced.

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