首頁 > 網路資源 > 大同大學數位論文系統

Title page for etd-0727110-191850


URN etd-0727110-191850 Statistics This thesis had been viewed 1817 times. Download 12 times.
Author Sheng-Ling Huang
Author's Email Address No Public.
Department Materials Engineering
Year 2009 Semester 2
Degree Master Type of Document Master's Thesis
Language English Page Count 88
Title Synthesis and Characterization of Nano Gold / Iron Wires Composites
Keyword
  • gold
  • nanowires
  • iron
  • iron
  • nanowires
  • gold
  • Abstract In recent years, gold nanoparticles and magnetic nanomaterials have already attracted many researchers in biomedical field. The purpose of this study is combining them, and then developed a new type of nano gold/iron nanowires composites. The structures, morphologies and magnetic properties of the synthesized nanocomposites are investigated in this study. 
    Under external magnetic field, iron nanowires are synthesized by chemical reduction method. Furthermore, the iron nanowires are used as supporter to support gold nanoparticles by polyol process using HAuCl4•3H2O as precursors. Different amounts of gold nanoparticles are deposited on the surfaces of iron nanowires for investigating the influence of added gold. Moreover, various heat treatments of synthesized nanocomposites are also examined.
    The results show that the saturated magnetizations of the gold/iron nanowires increase with the added amount of gold. With the same weight ratios of gold, the saturated magnetizations of gold/iron nanowires are changed by different heat treatment, which due to the different oxidation structures. 5 wt.% gold/iron nanowires heated in H2/Ar has higher saturated magnetization than that without heat treatment.
      The structures of nanocomposites are analyzed by X-ray diffraction (XRD) pattern. The contents of gold in nanocomposites are examined by Induced couple plasma (ICP). Field emission scanning electron microscope (FESEM) is applied to observe the morphologies, structures, sizes and dispersion of gold on iron nanowires. Vibration sample magnetometer (VSM) is used to investigate magnetic properties of the nanocomposites.
    Keywords: gold, iron, nanowires
    Advisor Committee
  • Hong-Ming Lin - advisor
  • none - co-chair
  • none - co-chair
  • Files indicate in-campus access only
    Date of Defense 2010-07-16 Date of Submission 2010-07-28


    Browse | Search All Available ETDs