Assembly of Magnetic Nanospheres into One-Dimensional Nanostructured Carbon Hybrid Materials

Abstract

The synthesis and characterization of carbon-coated ferromagnetic nanoparticles that organize into 1-D assemblies of micrometer-sized ferromagnetic chains is described. A controlled aromatization and carbonization of glucose under hydrothermal reaction conditions enabled the preparation of carbonaceous surfactants that were used as shells for the coating of ferromagnetic Fe(3)O(4) nanospheres with a uniform size distribution. Under controlled experimental conditions, it was, for the first time, demonstrated that glucose could be employed as the carbon source in the preparation of continuous 1-D carbon nanoparticle chains with magnetic nanosphere inclusions. The functional groups on the carbon surface will facilitate the linkage of functional groups or catalytic species to the surface in future application. The salient feature of the reported method was the assembly of magnetic nanospheres under hydrothermal reaction conditions in the absence of external fields.

Constructing Carbon-Coated Fe3O4 Microspheres as Antiacid and Magnetic Support for Palladium Nanoparticles for Catalytic Applications

“…Moreover, the outer polysaccharide layer offers a great many functional groups, such as carboxylic, aldehyde, and hydroxyl groups, on their surface. Therefore, catalytic noble metal nanoparticles (NPs) can be easily (15). However, the size uniformity and the thickness of carbon layer still need to be better controlled and its application as catalyst support needs to be investigated.…”

Synthesis and characterization of new functionalized polymer-Fe3O4 nanocomposite particles

“…In our case, the formation of polymer -Fe 3 O 4 nanocomposites was confirmed by FTIR measurements. This is evidenced by the absorbance maxima at wavelengths of the wave numbers of ~1720, 1050, 1250, and 750-800 cm -1 corresponding to the vibrations from the mers of glycidyl methacrylate in the synthesized polymer particles [42,43]. However, FTIR spectroscopy provided only information about the chemistry of nanocomposites.…”

“…Due to the low percentage of the modified magnetite particles, a smaller absorption in the range typical for magnetite (from approx. 570 cm -1 ) is observed [42,43]. To determine the optical properties of the modified and functionalized Fe 3 O 4 nanoparticles the DR UVVis spectra were collected.…”

Fabrication of 1D Fe3O4/P(NIPAM-MBA) thermosensitive nanochains by magnetic-field-induced precipitation polymerization

“…Therefore, most of the generated oligomers form water soluble P(NIPAM-MBA) microspheres through homogeneous nucleation instead of depositing onto the surface of (Fig. 7), indicating that these nanochains can be easily separated by an external magnetic field [36]. Figure 8 illustrated the separation and redispersion behavior of the magnetic Fe 3 O 4 /P(NIPAM-MBA) nanochains under different temperatures in water.…”