Abstract

A method has been developed for modifying the surface of iron oxide nanoparticles with a fluorescent dye based on fluorescein. It is shown that iron oxide nanoparticles chemically bind with a fluorescein derivative by means of preliminary surface modification with silicon dioxide. The composition and structure of the obtained composite nanoparticles have been confirmed by the IR, UV, and NMR spectroscopy, and TEM microscopy data. Composite nanoparticles based on nanoparticles of iron oxides and fluorescein have high sensitivity when visualizing microcracks in metal products by magnetic flaw detection.

中文翻译：

---

用于无损磁粉检测的复合氧化铁荧光纳米颗粒的开发

摘要

已经开发出一种用基于荧光素的荧光染料修饰氧化铁纳米颗粒表面的方法。结果表明，氧化铁纳米颗粒通过用二氧化硅进行初步表面改性而与荧光素衍生物化学结合。所得复合纳米粒子的组成和结构已通过红外光谱、紫外光谱和核磁共振光谱以及透射电镜数据证实。基于氧化铁和荧光素纳米粒子的复合纳米粒子在通过磁探伤检测金属产品中的微裂纹时具有高灵敏度。