Abstract
Coprecipitated ferrite nanoparticles were coated with carbon using a hydrothermal method. From transmission electron microscope pictures, we could see that the coated iron oxide nanoparticles were spherical in shape with an average diameter of 90 nm. The strong bonding of carbon on the nanoparticle surfaces was checked by noting the C = O and C = C vibrations in Fourier transform infrared spectra. The spin-lattice relaxation process [T1] and spin-spin relaxation process [T2] relaxivities of hydrogen protons in the aqueous solution of coated nanoparticles were determined to be 1.139 (mM·s)-1 and 1.115 (mM·s)-1, respectively. These results showed that the carbon-coated iron oxide nanoparticles are applicable as both T1 and T2 contrast agents in magnetic resonance imaging.PACS: 81.05.y; 76.60.Es; 61.46; 75.50.k; 87.61.
Highlights
Nanostructured materials have attracted a great deal of attention in the development of biotechnology and medicine [1,2,3]
The transmission electron microscope (TEM) images showed that the coated nanoparticles were spherical in shape with an average diameter of 90 nm
The average hydrodynamic diameter of the carbon-coated nanoparticles measured by a dynamic light scattering (DLS) particle size analyzer was about 200 nm (Figure 2)
Summary
Nanostructured materials have attracted a great deal of attention in the development of biotechnology and medicine [1,2,3]. Among these nanostructured materials, carbon-coated metal oxide nanoparticles such as MgO, CaO, ZnO, TiO2, Al2O3, and Fe2O3 are extensively studied because of their high application potential [4,5,6,7,8,9]. Different approaches have been employed for the synthesis of carbon coatings, for example, electric arc discharge, catalytic pyrolysis of organic compounds, and the hydrothermal methods [14]
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