Highly stable superparamagnetic iron oxide nanoparticles (SPION) prepared through a modified one-pot coprecipitation technique using citrate as a surfactant and capping agent. The result of the as-synthesized citrate–SPION via a one-pot technique is compared with peptized SPION synthesized via the coprecipitation method. Formation of citrate–SPION is characterized using transmission electron microscopy, x-ray diffractometer (XRD), Fourier transform infrared, zeta potential, and vibrating sample magnetometer. XRD result reveals that the citrate does not affect the crystalline structure and purity of the SPION. Zeta potential of the citrate–SPION and the peptized SPION is −44 mV and 38.4 mV, respectively. Similarly, the saturation magnetization values of citrate–SPION and peptized SPION are 53.9 emu g⁻¹ and 43.8 emu g⁻¹, respectively. The results show that the citrate–SPION prepared by modified a one pot technique has a higher saturation magnetization and is more stable than the peptized SPION.

通过使用柠檬酸盐作为表面活性剂和封端剂的改良的一锅共沉淀技术制备的高度稳定的超顺磁性氧化铁纳米粒子（SPION）。通过一锅法合成的柠檬酸盐-SPION的结果与通过共沉淀法合成的肽化SPION进行了比较。柠檬酸盐-SPION的形成使用透射电子显微镜，X射线衍射仪（XRD），傅立叶变换红外光谱，ζ电位和振动样品磁力计进行表征。XRD结果表明，柠檬酸盐不影响SPION的晶体结构和纯度。柠檬酸盐– SPION和肽化SPION的Zeta电位分别为-44 mV和38.4 mV。同样，柠檬酸盐–SPION和成肽的SPION的饱和磁化强度值为53.9 emu g ^-1和43.8 emu g ^-1。结果表明，用单罐法改良的柠檬酸盐-SPION的饱和磁化强度更高，并且比肽化SPION稳定。