Nowadays, carbon nanomaterials are increasingly garnering attention as the next generation of semiconductor materials. Notably, graphene and carbon nanofibers (CNFs) have emerged as pivotal players in the semiconductor domain, owing to their remarkable electrical, mechanical, and thermal properties, coupled with their distinctive structural attributes.Graphene, characterized by its two-dimensional single-layer structure of densely packed carbon atoms, boasts unparalleled electrical conductivity. This positions it for significant potential in applications like high-frequency electronic devices and sensors. Furthermore, its transparency and flexibility pave the way for innovative advancements in flexible electronic devices anddisplay technologies, rejuvenating the electronics industry's potential. CNFs, celebrated for their nanoscale diameter and exceptional mechanical attributes, carve a niche for themselves in material science. Their superior conductivity herald vast opportunities, especially in realms such as conductive fibers andflexible circuitry. Within the spectrum of synthesis techniques, Chemical Vapor Deposition (CVD) emerges as a standout method, particularly for producing high-quality graphene films and CNFs.This thesis delves into the CVD preparation, performance characterization, and subsequent applications of these materials, particularly in electromagnetic (EM) and ultraviolet (UV) optics. Specifically, the research encompasses:1) Investigating the photoluminescence (PL) performance of ZnO/graphene composite films and ZnO@CNFs composite fibers within the UV emission spectrum.2) Determining the optimal thickness of ZnO in the ZnO/graphenecomposite for optimal UV-PL behavior.3) Analyzing the anisotropic EM loss behavior of CNFs and ZnO@CNFs samples across the millimeter wave and sub-terahertz wave bands.4) Pioneering a novel quality-assessment method for wafer-scale CVD-prepared graphene films, grounded in the distinctive interactions among the local conductivity, surface defects on the graphene, and the terahertz TE10 waves.In essence, this research centers on graphene and CNFs, exploring their potential in the realm of EM and UV optics and offering insights based on their intrinsic properties.
Chen, C 2024, 'Novel Fabrication and electromagnetic-optical characterization techniques of carbon-based nanostructures', Doctor of Engineering Sciences, Vrije Universiteit Brussel, Brussels. <https://researchportal.vub.be/en/publications/novel-fabrication-and-electromagnetic-optical-characterization-te>
Chen, C. (2024). Novel Fabrication and electromagnetic-optical characterization techniques of carbon-based nanostructures. [PhD Thesis, Vrije Universiteit Brussel, Northwest University China]. Crazy Copy Center Productions. https://researchportal.vub.be/en/publications/novel-fabrication-and-electromagnetic-optical-characterization-te
@phdthesis{0d78e7edab7141de899c288d4519ad03,
title = "Novel Fabrication and electromagnetic-optical characterization techniques of carbon-based nanostructures",
abstract = "Nowadays, carbon nanomaterials are increasingly garnering attention as the next generation of semiconductor materials. Notably, graphene and carbon nanofibers (CNFs) have emerged as pivotal players in the semiconductor domain, owing to their remarkable electrical, mechanical, and thermal properties, coupled with their distinctive structural attributes.Graphene, characterized by its two-dimensional single-layer structure of densely packed carbon atoms, boasts unparalleled electrical conductivity. This positions it for significant potential in applications like high-frequency electronic devices and sensors. Furthermore, its transparency and flexibility pave the way for innovative advancements in flexible electronic devices anddisplay technologies, rejuvenating the electronics industry's potential. CNFs, celebrated for their nanoscale diameter and exceptional mechanical attributes, carve a niche for themselves in material science. Their superior conductivity herald vast opportunities, especially in realms such as conductive fibers andflexible circuitry. Within the spectrum of synthesis techniques, Chemical Vapor Deposition (CVD) emerges as a standout method, particularly for producing high-quality graphene films and CNFs.This thesis delves into the CVD preparation, performance characterization, and subsequent applications of these materials, particularly in electromagnetic (EM) and ultraviolet (UV) optics. Specifically, the research encompasses:1) Investigating the photoluminescence (PL) performance of ZnO/graphene composite films and ZnO@CNFs composite fibers within the UV emission spectrum.2) Determining the optimal thickness of ZnO in the ZnO/graphenecomposite for optimal UV-PL behavior.3) Analyzing the anisotropic EM loss behavior of CNFs and ZnO@CNFs samples across the millimeter wave and sub-terahertz wave bands.4) Pioneering a novel quality-assessment method for wafer-scale CVD-prepared graphene films, grounded in the distinctive interactions among the local conductivity, surface defects on the graphene, and the terahertz TE10 waves.In essence, this research centers on graphene and CNFs, exploring their potential in the realm of EM and UV optics and offering insights based on their intrinsic properties.",
author = "Cheng Chen",
year = "2024",
language = "English",
isbn = "9789464948387",
publisher = "Crazy Copy Center Productions",
address = "Belgium",
school = "Vrije Universiteit Brussel, Northwest University China",
}