Magnetic Properties of 1D Iron–Sulfur Compounds Formed Inside Single‐Walled Carbon Nanotubes

Abstract

Carbon-encapsulated magnetic nanoparticles are very prospective in the context of biomedical applications, [1] memory devices, [2] and magnetic sensors. [3] Singlewalled carbon nanotubes (SWCNTs) stand out among other different protective materials. They not only serve as a template for nano-dimensional growth [4] and promote interactions between the encapsulated species, but also can influence the properties of the formed host-guest structures. [5-7] Indeed, the SWCNT ensures a fine dispersion of magnetic species along the longitudinal axis, thus restricting the magnetic coupling between them and thereby enhancing the inherent properties of nanoparticles. [8-11] A reduction of intermolecular dipole-dipole interactions between the neighboring encapsulated molecules leading to enhanced magnetic properties was recently demonstrated for single-molecule magnets. [12] The 1D arrangement of singlemolecule magnets provides the suppression of quantum tunneling of the magnetization [12,13] that is crucial for practical applications. Initially, filling of nanotubes with magnetic species was studied for cobalt, [8,14,15] iron, [9,10,16-18] and nickel [19] nanoparticles. These metals are frequently used as catalysts for the growth of nanotubes [20] and often detected as side

Electrochemistry of Carbon Materials: Progress in Raman Spectroscopy, Optical Absorption Spectroscopy, and Applications

“…For these experiments, special electrochemical cells, electrolytes, electrode materials, and other parameters are important [ 141 ]. Recent works include electrochemical studies of carbon materials [ 253 , 254 , 255 , 256 , 257 , 258 , 259 , 260 , 261 , 262 , 263 , 264 , 265 , 266 , 267 , 268 , 269 , 270 , 271 , 272 , 273 , 274 , 275 , 276 , 277 , 278 , 279 , 280 , 281 ].…”

Magnetic nanoribbons with embedded cobalt grown inside single-walled carbon nanotubes

“…17 Various types of compounds have been successfully encapsulated and formed inside the nanotube channels, including magnetic nanostructures. [18][19][20] The diameter of the nanotubes is the foremost parameter that specifies the filling process 21 in terms of the encapsulation ability and type of the resulting nanostructure that can be formed inside. For example, for the case of coronene (C 24 H 12 ), a polycyclic aromatic hydrocarbon (PAH) molecule, encapsulation can result in the formation of molecule stacks oriented at different angles with respect to the nanotube axis 22,23 or in polymerization into nanoribbons (NRs) that are in general formed in larger diameter tubes.…”