Anisotropic magnetic carbon materials based on graphite and magnetite nanoparticles

Author(s)

Zuin, Andre ^[1] ; Novak, Miguel Alexandre ^[2] ; Toma, Sergio Hiroshi ^[1] ; Araki, Koiti ^[1] ; Toma, Henrique Eisi ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Quim, Sao Paulo - Brazil

^[2] Univ Fed Rio de Janeiro, Inst Fis, Rio De Janeiro - Brazil

• Document type: Journal article
• Source: Carbon; v. 77, p. 600-606, OCT 2014.
• Web of Science Citations: 4

Abstract

Magnetic graphite materials (GMag) were prepared by adsorbing oleate coated magnetite nanoparticles (MagNP) on the exposed surfaces of graphite, in the powder form. The materials were characterized by SEM (scanning electron microscopy) and EDX (energy dispersive X-ray fluorescence), and their magnetic properties were probed with a SQUID (superconducting quantum interference device) magnetometer. By incorporating MagNP, the modified graphite became responsive to magnetic fields, either as a powder or liquid suspension, allowing to reflect white light and lasers, and to control the light beam transmission, simulating smart windows and optical displays. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 09/08584-6 - Supramolecular chemistry and nanotechnology
• Grantee: Henrique Eisi Toma
• Support Opportunities: Research Projects - Thematic Grants