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- W2131917008 abstract "Stable colloidal suspension of magnetic nanoparticles is challenging owing to both van der Waals forces and magnetic dipolar interactions. Thus, it is essential to coat magnetic nanoparticles with a surfactant during chemical synthesis in order to prepare well-dispersed nanoparticle colloid. In the present study, cobalt nanoparticles (∼15 nm in size) were synthesized with the fatty acid (oleic acid) as a surfactant. The chemical interaction of the surfactant with the Co nanoparticles was studied by using Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The results indicated that oleic acid gets chemisorbed as a carboxylate on the Co nanoparticle surfaces, and the two oxygen atoms in the carboxylate are coordinated symmetrically to the Co atoms, leading to the formation of the covalent Co−O bond. This result has implications for the strong interaction between the surfactant and Co nanoparticle, which enhances the stability of Co colloid." @default.
- W2131917008 created "2016-06-24" @default.
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- W2131917008 date "2004-01-16" @default.
- W2131917008 modified "2023-10-09" @default.
- W2131917008 title "Interaction of Fatty Acid Monolayers with Cobalt Nanoparticles" @default.
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- W2131917008 doi "https://doi.org/10.1021/nl035139x" @default.
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