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Shape and size controlled synthesis of uniform iron oxide nanocrystals through new non-hydrolytic routes

机译:通过新的非水解途径合成均匀的氧化铁纳米晶体的形状和尺寸受控的合成

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摘要

New, non-hydrolytic routes to synthesize highly crystalline iron oxide nanocrystals (8-40 nm, magnetite) are described in this report whereby particle size and morphology were precisely controlled through reactant (precursor, e.g. (FeO(OH)) ratios, co-surfactant and organic additive, and/or reaction time. Particle size, with high monodispersivity (<10%), is demonstrated to be a function of precursor concentrations and through the addition of different cosurfactants and/or additives, cubic, octahedral, potato-like, and flower-like iron oxide nanocrystals can be reproducibly synthesized through simple one-pot thermal decomposition methods. High resolution transmission electron microscope, x-ray diffraction, and superconducting quantum interference device were used to characterize the size, structure and magnetic properties of the resulting nanocrystals. For aqueous applications, materials synthesized/purified in organic solvents are broadly water dispersible through a variety of phase (aqueous) transfer method(s).
机译:此报告中描述了合成高度结晶的氧化铁纳米晶体(8-40 nm,磁铁矿)的新的非水解途径,其中通过反应物(前体,例如(FeO(OH))比),共表面活性剂和有机添加剂,和/或反应时间,具有高单分散性(<10%)的粒径,是前体浓度的函数,并通过添加不同的辅助表面活性剂和/或添加剂(立方,八面体,马铃薯-可以通过简单的一锅热分解方法可重复合成花状氧化铁纳米晶体,并使用高分辨率透射电子显微镜,x射线衍射和超导量子干涉装置表征了纳米晶的尺寸,结构和磁性。对于水性应用,在有机溶剂中合成/纯化的材料可广泛分散在各种相中( queous)传输方法。

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