Ma, Yanwen Hu, Zheng Yu, Leshu Hu, Yemin Yue, Bing Wang, Xizhang Chen, Yi Lu, Yinong Liu, Yang Hu, Junhui Chemical Functionalization of Magnetic Carbon-Encapsulated Nanoparticles Based on Acid Oxidation Carbon-encapsulated nickel nanoparticles were used as the representative magnetic carbon-encapsulated nanoparticles for chemical functionalization. After oxidation with the mixed acid of H<sub>2</sub>SO<sub>4</sub>/HNO<sub>3</sub> under a moderate ultrasonic bath, carboxylic acid groups (−COOH) were effectively generated on the fullerene-like carbon shells, which in turn were utilized to covalently link octadecylamine through an amide reaction. The whole chemical process is well characterized by many methods such as Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetry-differential scanning calorimetry, transmission electron microscopy, and so on, and the self-consistent experimental results were obtained. The results suggested that the magnetic nanoparticles could be well protected, while their magnetic properties could be utilized to guide the transfer of the grafted functional species on the particle surface. This provides many possibilities for potential applications in chemical and biochemical fields. transmission electron microscopy;nanoparticle;acid;H 2SO;COOH;chemical process;amide reaction;chemical Functionalization;particle surface;chemical functionalization;covalently link octadecylamine;spectroscopy 2006-10-19
    https://acs.figshare.com/articles/journal_contribution/Chemical_Functionalization_of_Magnetic_Carbon_Encapsulated_Nanoparticles_Based_on_Acid_Oxidation/3052705
10.1021/jp062957f.s001