CCVD Synthesis of Carbon‐Encapsulated Cobalt Nanoparticles for Biomedical Applications

The Synthesis of Superparamagnetic Cobalt Nanoparticles Encapsulated in Carbon Through High‐pressure CVD

“…During the last decades magnetic nanoparticles have attracted considerable attention due to their high potential applications such as catalysis, magnetic data storage, magnetic resonance imaging, and magnetic hyperthermia therapy . Magnetic oxides, such as γ ‐Fe 2 O 3 particles, are currently used for some of these applications, but magnetic metals are preferred due to their superior magnetic properties.…”

Co9Se8 Nanoplates as a New Theranostic Platform for Photoacoustic/Magnetic Resonance Dual‐Modal‐Imaging‐Guided Chemo‐Photothermal Combination Therapy

“…Because cobalt has three unpaired electrons and large saturation magnetization value (1422 emu cm −3 ), [18] some zero-valence ferromagnetic cobalt particles based T 2 -weight MRI contrast agents have been developed. [19] We subsequently investigated the potential of PAA-Co 9 Se 8 nanoplates to enhance MRI contrast. As shown in Figure 2d, the darker MR images of the aqueous solution of PAA-Co 9 Se 8 nanoplates were obtained as the concentrations of PAA-Co 9 Se 8 nanoplates increased.…”

Cobalt‐Embedded Nitrogen‐Doped Carbon Nanotubes as High‐Performance Bifunctional Oxygen Catalysts

“…TEM observation further revealed that these wires were bamboo-like hollown anotube structures ( Figure 1b Figure 1c)a nd XRD ( Figure 1d). TheH RTEM image confirmed that these cobaltN Ps were coveredb yc rystallized carbons, [27,28] which protected the NPs from acid etching and oxidation during post-treatment after pyrolysis, and thus,w ould help to improve the stability of catalysts in the ORR and OER.X -ray Photoelectron Spectroscopy (XPS) analysis ( Figure 1e)r evealed the dominating presence of C( 90.78 at %),a nd moderate N( 3.99 at %) and Co (0.92 at %) for Co@NCNT-700;t his further indicated the formation of metal-containing nitrogen-doped carbon materials. TheC o2pX PS spectrum ( Figure S1 in the Supporting Information) showed three types of Co species,n amely,m etallic Co (778.2 eV), CoÀCN (779.6 eV),a nd CoÀN( 782.0 eV).…”

“…The presence of metallic cobalt was evidenced by HRTEM (Figure c) and XRD (Figure d). The HRTEM image confirmed that these cobalt NPs were covered by crystallized carbons, which protected the NPs from acid etching and oxidation during post‐treatment after pyrolysis, and thus, would help to improve the stability of catalysts in the ORR and OER. X‐ray Photoelectron Spectroscopy (XPS) analysis (Figure e) revealed the dominating presence of C (90.78 at %), and moderate N (3.99 at %) and Co (0.92 at %) for Co@NCNT‐700; this further indicated the formation of metal‐containing nitrogen‐doped carbon materials.…”