Paper Title:
Scalable Production of Carbon Encapsulated Ni Nanoparticles by Water Arc Discharge: Structural and Magnetic Properties
  Abstract

An electric arc discharge in de-ionised water between a solid graphite cathode and an anode made by compressing Ni and C containing powders in a mass ratio of Ni:C = 7:3 was used here to prepare carbon encapsulated Ni nanoparticles in the form of powder suspended in water. The morphology of the produced material was analysed using high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). The magnetic properties of the samples were determined using a Princeton vibrating sample magnetometer (VSM). Collection of the powder produced from different depths in the water container has proved to be an effective method for obtaining samples with narrow particle size distribution. Further material purification by dry NH4 plasma etching was used to remove the amorphous carbon content of the samples. XRD and HRTEM analysis showed that the material synthesized is fcc Ni particles with mean particle size ranging from 14 to 30 nm encapsulated in 2 to 5 graphitic cages. The data suggests that the process reported has the ability to mass-produce carbon encapsulated ferromagnetic nanoparticles with desired particle size distribution, and hence with controlled size-dependent magnetic properties.

  Info
Edited by
M. Gupta and Christina Y.H. Lim
Pages
87-90
DOI
10.4028/www.scientific.net/JMNM.23.87
Citation
K.H. Ang, I. Alexandrou, N.D. Mathur, R. Lacerda, I.Y.Y. Bu, G. Amaratunga, S. Haq, "Scalable Production of Carbon Encapsulated Ni Nanoparticles by Water Arc Discharge: Structural and Magnetic Properties", Journal of Metastable and Nanocrystalline Materials, Vol. 23, pp. 87-90, 2005
Online since
January 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jun Xue, S.C. Chen, H.K. Tang, H.K. Xiang, X.H. Wang, H. Cao
Abstract:Carbon-encapsulated Cobalt nanoparticles were synthesized with sucrose as carbon source and cobalt nitrate as metal source in nitrogen...
2201
Authors: Jin Shan Pang, Hai Yan Zhang, Li Ping Li
Micro/Nano Materials
Abstract:Carbon-encapsulated copper nanoparticles were synthesized by a carbon arc discharge method. The particles were characterized in detail by...
801
Authors: Zhi Qiang Wei, Xiao Yun Wang, Hua Yang
Abstract:Special carbon encapsulated Fe core-shell nanoparticles with a size range of 15–40 nm were successfully prepared via confined arc plasma...
245
Authors: Jun Yu, Bing She Xu
Chapter 2: Micro/Nano Materials and Ceramic
Abstract:Carbon-encapsulated Ni nanoparticles with the size of 5 to 30 nm were synthesized from de-oiled asphalt (DOA) by heat-treatment at 1800 °C...
202