rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Effects of transport processes to the deposition and quality of atmospheric pressure chemical vapour deposited graphene
  name:
    name part: Fatin Bazilah Fauzi
    role:
      role term: creator
    role:
      role term: author
  name:
    name part: International Islamic University Malaysia
    name part: Kulliyyah of Engineering
  genre: Theses, IIUM local
  origin info:
    place:
      place term: my
    date issued: 2021
  language:
    language term: eng
  physical description:
    extent: xix, 165 leaves : illustrations ; 30cm.
  abstract: Until now, producing homogeneous chemical vapour deposited graphene with zero defects remains a challenge. The research on chemical aspects has been extensively explored either through experiments or computational studies. Given that it is a mass-transport limited process for atmospheric-pressure CVD (APCVD), the gas-phase dynamics and interfacial phenomena at the gas-solid interface (i.e., the boundary layer) is a crucial controlling factors. In this research, the importance of CVD fluid dynamics aspect was emphasised through fundamental studies at both gas-phase and gas-solid phase. As a preliminary study, an extensive review of available APCVD literature provided information on the relationship of graphene quality and its corresponding growth parameter. From these parameters, Reynolds number was calculated with the consideration that it is a ternary gas mixture. This was then compiled into a CH4-H2-Ar ternary plot which predicts the quality of graphene and Reynolds number at all gas compositions. Higher Reynolds number was found to be promising for high-quality graphene deposit which could be obtained at the gas composition range of ≤1% of CH4, ≤10% of H2, and ≥90% of Ar. Following this, a customised homogenous gas with properties similar to mixture of CH4, H2 and Ar was used in our computational fluid dynamics (CFD) of APCVD graphene. The in-depth details on gas-phase dynamics, interfacial phenomena, particularly the boundary layer and mass transport during the deposition process, were studied. Conditions, where gravity parameter is vital or could be safely neglected in CFD, was also determined. CFD model also allowed a close-up view of the boundary layer at the gas-solid interface. This was found to provide the most reasonable estimation of boundary-layer thickness formed on top of substrate for a bounded flow system like in a CVD. Higher Reynolds number formed thinner boundary layer. Consecutively, the relationship between the deposited graphene quality with R…
  note: by Fatin Bazilah Fauzi
  note: Thesis (Ph.D)--International Islamic University Malaysia, 2021.
  note: Includes bibliographical references (leaves 118-127).
  classification: TS695
  identifier: http://studentrepo.iium.edu.my/handle/123456789/10689
  record info:
    record content source: UIAM
    record creation date: 210928
    language of cataloging:
      language term: eng