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Effect of cysteine substitutions on the structural and magnetic properties of Fe3O4–Cysteine/RGO and Fe3O4/RGO–Cysteine nanocomposites

Sahebalzamani, H ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1007/s10948-018-4779-4
  3. Publisher: Springer New York LLC , 2019
  4. Abstract:
  5. We synthesized by electrostatic self-assembly route in basic solution Fe3O4–cysteine/RGO and Fe3O4/RGO–cysteine nanocomposites. In this method, electrostatic interaction was created via negatively charged surface of the reduced graphene oxide and reduced graphene oxide–cysteine sheets and positively charged surface of the Fe3O4 and Fe3O4–Cys nanoparticles in aqueous solution. The structural and magnetic properties of the prepared samples were analyzed by x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM), respectively. The dependences of magnetization as a function of applied field using a vibrating sample magnetometer exhibit S-like curves, indicating a magnetic hysteresis behavior for all samples. It clearly showed that, the nanocomposites showed a reduction of saturation magnetization to the Fe3O4 nanoparticles. © 2018, Springer Science+Business Media, LLC, part of Springer Nature
  6. Keywords:
  7. Electrostatic self-assembly ; Fe3O4 ; TEM ; VSM ; Amino acids ; Charged particles ; Electrostatics ; Fourier transform infrared spectroscopy ; Graphene ; High resolution transmission electron microscopy ; Magnetic properties ; Magnetite ; Magnetometers ; Nanocomposites ; Nanoparticles ; Saturation magnetization ; Self assembly ; Solutions ; Transmission electron microscopy ; Cysteine substitutions ; Electrostatic self assembly ; Fe3O4 ; Negatively charged surfaces ; Positively charged surfaces ; Reduced graphene oxides ; Structural and magnetic properties ; Vibrating sample magnetometer ; Iron oxides
  8. Source: Journal of Superconductivity and Novel Magnetism ; Volume 32, Issue 5 , 2019 , Pages 1299-1306 ; 15571939 (ISSN)
  9. URL: https://link.springer.com/article/10.1007%2Fs10948-018-4779-4