Forthcoming articles

 


International Journal of Nanoparticles

 

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International Journal of Nanoparticles (3 papers in press)

 

Regular Issues

 

  • Structural and Magnetic properties investigation of sintered MnxMg1-xFe2O4 ferrites from nanopowders prepared via co-precipitation method   Order a copy of this article
    by Sohrab Manouchehri, Seyed Taghi Mohammadi Benehi, Mohammad Hassan Yousefi, Javad Zahmatkesh, Mohsen Abdollahi 
    Abstract: Nanoferrite powders having composition MnxMg1-xFe2O4 (x= 0.0, 0.2, 0.4, 0.6, 0.8) were synthesized by the chemical co-precipitation method and then sintered as the pellets. The X-ray diffraction (XRD), Alternating Gradient Force Magnetometer (AGFM) techniques and Curie temperature measurement were used to carry out this study. The XRD patterns confirm the nanosized dimension of the samples and showed that the samples are single phase cubic spinel nanoferrites. From the analysis of XRD data using Scherrers formula, the average crystallite size (DXRD) of the particles was found to decrease from 81 to 55 nm with increasing manganese substitution. Substitution of Mn2+ in MgFe2O4 causes an increase in the lattice constant (a) from 8.35 to 8.43
    Keywords: Nanoferrite powders; Co-precipitation method; Sintering; Spinels; Magnetic properties
     
  • Synthesis and Microstructure of Gallium Substituted Cobalt Ferrite Nanoparticles by Hydrothermal Method   Order a copy of this article
    by Gayathri Sivaraman, Kalainathan sivaperuman 
    Abstract: Magnetic CoFe2-xGaxO4 nanoparticles were successfully synthesized via hydrothermal method. The samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM).The experimental results showed that the CoFe2-xGaxO4 were composed of single phase spinel structure and the average crystallite size is between 42 and 57nm.The saturation magnetization (Ms) of the CoFe2-xGaxO4 nanoparticles decreased linearly as the contents of Ga increased for x = 0.2 -0.8 which can be used in sensor applications.
    Keywords: Magnetic Nanoparticles;Hydrothermal method;FESEM;HRTEM;VSM magnetic studies.
     
  • Silver nanoparticles bioreduction by Dittrichia Viscosa leaves extract and its bactericidal effects   Order a copy of this article
    by sofiane sedira, Nadjeh Sobti 
    Abstract: A variety of chemical and physical procedures could be used for synthesis of silver nanoparticles. However, these methods are confronted with many problems including use of toxic solvents. A green method for silver nanoparticles synthesis using Dittrichia Viscosa leaves extract is proposed. This plant is available in abundance on the coastal Mediterranean countries can replace polyvinylpyrrolidone conventionally used in the synthesis of silver nanoparticles. Polyol method (reflux heating) was used for silver nanoparticles synthesis. The nanoparticles obtained were characterized using x-ray diffraction, ultravioletvisible spectroscopy, Raman spectroscopy, Fourier Transform Infrared spectroscopy and transmission electron microscopy. Compared with silver nanoparticles prepared by polyvinylpyrrolidone and ethanol 96%, the bactericidal effect of silver nanoparticles synthesized by Dittrichia Viscosa is more efficient against bacteria. No toxic solvents were used in the present work; therefore, it is an environmentally safe method with potential for biomedical applications.
    Keywords: silver nanoparticles, Dittrichia Viscosa, bactericidal effect.