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Facile fabrication and characterization of amino-functionalized Fe 3O4 cluster@SiO2 core/shell nanocomposite spheres

Kalantari, M ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.materresbull.2013.01.051
  3. Publisher: 2013
  4. Abstract:
  5. We developed a modified straightforward method for the fabrication of uniformly sized silica-coated magnetite clusters core/shell type nanocomposite particles. Proposed simple one-step processing method permits quick production of materials in high yield. The structural, surface, and magnetic characteristics of the nanocomposite particles were investigated by transmission electron microscopy (TEM), scanning electron microscope (SEM), powder X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and Fourier-transform infrared (FTIR). The sphere-shaped particles almost have the average diameter of 120 nm, with a magnetic cluster core of 80 ± 15 nm, and a silica shell of 25 ± 10 nm thickness. The particles are superparamagnetic and present strong magnetization (18 emu/g) due to the fact that they possess core of the magnetic clusters. Subsequently, the silica surface of core/shell particles was amino-functionalized via N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (EDS). Findings of the present work highlight the potential for using amino-functionalized magnetic silica core/shell nanocomposite particles in biological applications since they possess useful magnetic properties and proper structure
  6. Keywords:
  7. A. Composites ; A. Magnetic materials ; A. Nanostructures ; D. Magnetic properties ; D. Magnetic structure ; Aminopropyltrimethoxysilane ; Biological applications ; Fourier transform infra reds ; Magnetic characteristic ; Powder X ray diffraction ; Straight-forward method ; Transmission electron microscopy (TEM) ; Vibrating sample magnetometer ; Fourier transform infrared spectroscopy ; Magnetic materials ; Magnetic properties ; Nanocomposites ; Scanning electron microscopy ; Silica ; Superparamagnetism ; Transmission electron microscopy ; X ray diffraction ; Magnetic bubbles
  8. Source: Materials Research Bulletin ; Volume 48, Issue 6 , 2013 , Pages 2023-2028 ; 00255408 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S002554081300086X