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Multi-walled carbon nanotubes (MWCNTs) have drawn increasing attention in biomedical fields because of their unique structures and properties, including good photothermal performance, large surface areas, strong near-infrared (NIR) absorbance, and size stability on the nanoscale. However, big challenge for this platform is to achieve fluorescence/magnetic resonance (MR) imaging and photothermal therapy...
Magnetofluorescent carbon quantum dots (MCQDs) have attracted significant attention in biomedical studies due to their major role in cancer photothermal therapeutics. We synthesized the FeN@CQDs with intrinsic photoluminescent and magnetic properties with a green, hydrothermal method. These magnetofluorescent FeN@CQDs were conjugated with a folic acid and riboflavin (Rf-FA-FeN@CQDs) as the light-triggered...
Activated carbon was oxidized by an acid mixture of concentrated HNO3 and H2SO4 with a volume ratio of 1:1 diluted with the same volume of de-ionized water, followed by reduction with iron dust to modify its surface chemical properties for CO2 adsorption. The samples before and after the modification were characterized by N2 adsorption, elemental analysis, FT-IR and XPS. CO2 adsorption properties...
Activated carbon (AC) was modified with sodium citrate at a concentration of 5–15% by impregnation to develop a new type of adsorbent, named N x –AC where x is the concentration. Their pore structures and surface chemical properties were characterized by N 2 adsorption, Boehm titration and FT-IR. The adsorption of copper ions by the N x –AC and the regenerated ones were investigated...
Graphene oxide nanosheets were used to induce the in situ gelation of doxorubicin hydrochloride as an antitumor drug. When a very small amount of the graphene oxide was introduced into an aqueous solution of doxorubicin hydrochloride at room temperature, a strong and thixotropic gel was rapidly formed without any polymers or chemical additives. The gelation mechanism was investigated by fluorescence...
A study of the structural transformation of catalytically grown carbon nanotubes induced by annealing under high pressure is presented in this paper. These changes have been monitored with the atomic details using high resolution electron microscopy. The transformation from carbon nanotube into quasi-spherical onion occurs in several steps: first, the shell of the nanotube collapses, and then tends...
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