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: Biocompatible and antibacterial silver tantalum oxide thin film by magnetron sputtering for surgical applications
  name:
    name part: Rodianah Alias
    role:
      role term: creator
    role:
      role term: author
  name:
    name part: Universiti Malaya
  type of resource: text
  origin info:
    place:
      place term: my
    date issued: 2019
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xxiii, 152 leaves; 30 cm.
  abstract: Stainless steel (SS) is used extensively for healthcare, hygiene and surgical applications due to its excellent corrosion resistance and adequate mechanical strength. SS grade 316L is the most widely employed stainless steel owing to the high corrosion resistance, good mechanical properties, resistance to sensitization and ease of fabrication. Nonetheless, stainless steel lacks antibacterial activity. To incorporate the antimicrobial characteristic In SS 316L-based surgical instruments, a new nanocomposite thin film coating comprising silver (A g) and tantalum oxide (TalOs) was deposited by physical vapor deposition (PVD) reactive magnetron sputtering in this research. The delamination of the ceramic layers on the SS 316L substrate is one of the major limitations arising from insufficient crystallization and poor adhesion strength. It was found that the adhesion strength improved in a precisely controlled thermal treatment process. The microstructure. morphology, phases, elemental, structure, micromechanical properties, surface chemistry. hydrophobicity, toxicity and antibacterial performance of the as-deposited and annealed thin film specimens were analyzed to determine the characteristics of the developed layers. The thermal treatment setup involved temperatures of 250 to 850°C that progressively increased the crystallinity and segregation of Ag at the surface. The highest adhesion strength was achieved when the coated samples were annealed at 400°C, with 154 % improvement achieved compared to the as-deposited layer. The samples annealed at 400 °C demonstrated excellent antibacterial performance against gram-negative Escherichia coli (A TCC 15597) and gram-positive Staphylococcus aureus (NCTC 6571) according to inhibition zone measurements. Ag/Ag-Ta-O, prepared at 400°C exhibited significantly superior biocompatibility (cell attachment and proliferation of seeded human bone marrow-derived mesenchymal stromal cells) compared to Ag/Ag-Ta-O, annealed at 700°C as well…
  table of contents: 1. Introduction -- 2. Literature review -- 3. Methodology -- 4. Result and discussion -- 5. Conclusion and future work
  note: Rodianah binti Alias.
  note: Thesis (Degree of Doctor of Philosophy in Mechanical Engineering) - Universiti Malaya, 2019
  note: Includes bibliographical references (leaves 129-149)
  subject:
    name:
      name part: Universiti Malaya --
    topic: Dissertations
  subject:
    topic: Dissertations, Academic
  subject:
    topic: Biocompatible Materials
  subject:
    topic: Stainless steel
  classification: R857.M3
  record info:
    record content source: UniSZA
    record creation date: 190903
    record change date: 20191204090000.0
    record identifier: 0000096824