Here we demonstrate a simple method for the organic sonosynthesis of stable Iron Carbide@Iron Oxide core-shell nanoparticles (ICIONPs) stabilized by oleic acid surface modification. This robust synthesis route is based on the sonochemistry reaction of organometallic precursor like Fe(CO)₅ in octanol using low intensity ultrasonic bath. As obtained, nanoparticles diameter sizes were measured around 6.38 nm $\pm$ 1.34 with a hydrodynamic diameter around 25 nm and an estimated polydispersity of 0.27. Core-Shell structure of nanoparticles was confirmed using HR-TEM and XPS characterization tools in which a core made up of iron carbide (Fe₃C) and a shell of magnetite (γ-Fe₂O₃) was found. The overall nanoparticle presented ferromagnetic behavior at 4K by SQUID. With these characteristics, the ICIONPs can be potentially used in various applications such as theranostic agent due to their properties obtained from the iron oxides and iron carbide phases.

在这里，我们演示了一种简单的方法，用于通过油酸表面修饰稳定的稳定的碳化铁@氧化铁核壳纳米粒子（ICIONPs）的有机超声合成。此稳健的合成路线基于使用低强度超声浴的有机金属前体（如Fe（CO）₅在辛醇中）的声化学反应。所获得的纳米颗粒直径尺寸约为6.38 nm$\pm$1.34，流体动力学直径约为25 nm，多分散性估计为0.27。使用HR-TEM和XPS表征工具，其中芯由铁碳化物的向上（铁纳米颗粒的核-壳结构，确认₃ C）和（γ-磁铁矿的Fe的壳₂ ö ₃）被发现。通过SQUID，整个纳米粒子在4K时呈现出铁磁行为。凭借这些特性，由于ICIONPs从氧化铁和碳化铁相中获得的特性，因此可以潜在地用于各种用途，例如治疗病治疗剂。