Nanomaterial Modified Paper-Based Sensor for Bio-Applications

Abstract

Faced with urgent environmental and health challenges, the world is in dire need solutions, in the field of biosensing devices, which frequently depend on metal electrodes that pose environmental, cost, and health concerns. The accumulation of unrecycled paper waste is an additional critical issue. This research project aims to tackle these concerns by investigating the potential of using office paper as a cellulose source. Cellulose is affordable, non-toxic, and can be easily combined with graphene oxide (GO), another affordable material with a variety of functional groups that can improve the cellulose-based composite.

The project involves developing a GO-cellulose memristor derived from paper, offering a sustainable and accessible alternative for biosensing applications. Utilizing the unique properties of cellulose and GO, the memristor can provide a more eco-friendly and efficient solution for the growing need for biosensing technologies. This thesis delves into the development and optimization of these memristive devices, focusing on their application in gas sensing. Comprehensive experimentation is conducted on material synthesis, characterization, and functional testing with variations in GO concentrations, substrate materials, and electrode configurations.

Through systematic modifications—ranging from different reduction methods to the strategic use of binding agents like APTES—the study refines our understanding of resistive switching mechanisms and their implications for sensor design. It assesses the impact of device parameters such as layer thickness and electrode material on performance, culminating in the successful application of these memristors in detecting gases, critical biomarkers for different diseases. This work not only contributes significantly to the field of material science, memristor and sensor technology but also paves the way for future innovations in sustainable biosensing devices.

Date of Award	19 Jul 2024
Original language	American English
Supervisor	Nahla Alamoodi (Supervisor)