Multifunctional graphene-based and amorphous magnetic materials: synthesis, characterization, and applications in electromagnetic shielding and advanced gas sensing

TL;DR

This research explores scalable production of graphene-based and amorphous magnetic materials, demonstrating their enhanced electromagnetic shielding and gas sensing capabilities, with potential biomedical sensor applications.

Contribution

It introduces scalable methods for producing graphene materials and demonstrates their synergistic use with magnetic materials in shielding and sensing applications.

Findings

FLMG improves electromagnetic shielding effectiveness.

FLMG enhances NO2 gas sensor performance.

Amorphous magnetic materials are promising for biomedical sensors.

Abstract

This thesis thoroughly investigates the production, characterization, and applications of graphene-based materials (GBMs) and amorphous magnetic materials, particularly in electromagnetic shielding and gas sensing. Four main research lines are pursued: GBM production, GBMs and amorphous magnetic materials in shielding applications, GBMs in gas sensors, and amorphous magnetic materials in magnetoelastic resonance-based sensors. Scalable methods for GBM production are explored, including ball milling, yielding few-layered mesoporous graphene (FLMG). FLMG enhances electromagnetic shielding when combined with amorphous magnetic microwires (MW), showing synergistic effects. FLMG also demonstrates effective NO2 detection in gas sensors, with UV irradiation improving sensor performance. Amorphous magnetic materials show promise in magnetoelastic resonance-based sensors for biomedical applications. Overall, this thesis addresses current limitations in electromagnetic shielding and gas detection, supported by patents and scientific publications.