Assembly and Magnetic Bistability of Mn₃O₄ Nanoparticles Encapsulated in Hollow Carbon Nanofibers

Abstract

Unter Verschluss: Magnetische Nanopartikel wurden in hohlen Kohlenstoffnanofasern eingeschlossen. Dichte und Orientierung der Mn3O4‐Nanopartikel hängen von der inneren Struktur des Kohlenstoff‐Nanocontainers ab, was eine Feinabstimmung der magnetischen Eigenschaften des Kompositmaterials ermöglicht.

Molecular and crystal assembly inside the carbon nanotube: encapsulation and manufacturing approaches

“…7). The study by Del Carmen Gimenez-Lopez et al [4] also showed that larger nanobricks were encapsulated when CNFs were used, over GNF (see Fig. 7).…”

“…However, a considerable advantage of the assimilation of packed metal oxides in the CNFs was their higher packing density (26 % vs. 11 %) than in GNFs. The study by Del Carmen Gimenez-Lopez et al [4] showed that the most magnetic material was the CNF composite, given its higher packing density of metaloxide (see Fig. 7).…”

“…In further context with electromagnetic and energetic metal-based molecules, Del Carmen Gimenez-Lopez et al [4] inserted Mn 3 O 4 nanobricks into herringbone-formed CNF and GNF, after a suspension of metal oxide particles in hexane, diluted in supercritical CO 2 (at 27.580 MPa, 40°C). Interestingly, the packing of the metal oxide particles gave fully aligned particles in the GNF, while random orientations of the metal oxide particles in the CNF (see Fig.…”

“…Encapsulation of molecules and crystal assemblies inside carbon nanotubes (CNT) has recently attracted a great deal of attention in the field of nanomaterials, nanocomposites, nanowires and selective catalysis [1][2][3][4]. The encapsulated composites have been demonstrated to retain their electronic and magnetic properties, which prove useful for spintronics and energy-related applications [4], such as quantum cascade lasers and high-energy technologies [5][6][7].…”

“…Encapsulation of molecules and crystal assemblies inside carbon nanotubes (CNT) has recently attracted a great deal of attention in the field of nanomaterials, nanocomposites, nanowires and selective catalysis [1][2][3][4]. The encapsulated composites have been demonstrated to retain their electronic and magnetic properties, which prove useful for spintronics and energy-related applications [4], such as quantum cascade lasers and high-energy technologies [5][6][7]. Based on their chemistry and electrostatic interactions, the encapsulated species have the possibility of supplying high-energy electrostatic environments for intra-tubular conductance and lowering band gaps by the electronic interaction energy between the intra-face of the nanotubes and the encapsulated assemblies [8,9].…”