Dipartimento di Scienze Chimiche, Università di Cagliari, Cittadella Universitaria, 09042 Monserrato, Cagliari, Italy.
J Colloid Interface Sci. 2010 Mar 15;343(2):415-22. doi: 10.1016/j.jcis.2009.12.007. Epub 2009 Dec 6.
A surfactant-assisted route in aqueous media has been shown to be suitable to prepare either individual primary CoFe(2)O(4) nanocrystals or secondary spherical nanoporous assemblies with a high surface area. The formation of primary nanoparticles or of spherical assemblies is found to be dependent on the presence of the surfactant and on the particle size, but is shown that the nanoparticle-surfactant interface plays a dominant role. The size of the primary CoFe(2)O(4) particles is controlled by the type of salt, the synthesis temperature and the concentration of the precursors. A detailed characterization evidences the shape and size of the primary particles, the way in which the primary particles assemble and their features in terms of morphological, textural and magnetic properties.
一种在水相介质中使用表面活性剂的方法已被证明适合制备单个初级 CoFe(2)O(4)纳米晶体或具有高表面积的次级球形纳米多孔组装体。初级纳米颗粒或球形组装体的形成被发现取决于表面活性剂的存在和颗粒尺寸，但表明纳米颗粒-表面活性剂界面起着主导作用。初级 CoFe(2)O(4)颗粒的尺寸由盐的类型、合成温度和前体浓度控制。详细的特征证明了初级颗粒的形状和尺寸、初级颗粒的组装方式以及它们在形态、结构和磁性方面的特征。
