Abstract
AbstractNanoparticles from transition metal oxides can be synthesized in various ways. A common synthesis route uses metal-oleate complex precursors that can be thermally decomposed, leading to crystalline metal-oxide nanoparticles with a narrow size distribution. The morphology of nanoparticles synthesized in such a way is strongly influenced by the synthesis parameters. In this study, the influence of the heating profile during the decomposition of iron oleate precursor on the size of the resulting iron oxide nanoparticles in the presence of surfactants was investigated. As surfactants oleic acid and sodium oleate were utilized for nanoparticle synthesis allowing additionally for shape control. Most of the prepared nanoparticles reveal a characteristic core–shell structure. The dominant structure is the cubic spinel structure of maghemite (γ-(Fe3+)2O3) or magnetite (Fe2+(Fe3+)2O4), while in the core region of the nanoparticles, wustite (Fe2+O) is present. The heating rate applied for the nanoparticle synthesis was systematically varied from 1 to 30 °C/min, while all other parameters were kept constant. A strong increase of the particle size (> 20 nm) was observed for low heating rates, which could be explained qualitatively in the frame of the LaMer model and allows for fine-tuning and control of the particle size.
Publisher
Springer Science and Business Media LLC
Subject
Condensed Matter Physics,General Materials Science,Modeling and Simulation,General Chemistry,Atomic and Molecular Physics, and Optics,Bioengineering
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献