Chen Jun, Tu Mengdong, Xu Mengying, Gong Depeng, Li Xi, Zhang Chaocan
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China.
Nanomaterials (Basel). 2024 May 14;14(10):852. doi: 10.3390/nano14100852.
In this paper, we designed and investigated a reduction-based method to synthesize controllably monodisperse superparamagnetic nano FeO colloidal clusters for magnetically responsive photonic crystals. It was shown that the addition of ascorbic acid (VC) to the system could synthesize monodisperse superparamagnetic nano FeO and avoided the generation of γ-FeO impurities, while the particle size and saturation magnetization intensity of nano FeO gradually decreased with the increase of VC dosage. Nano FeO could be rapidly assembled into photonic crystal dot matrix structures under a magnetic field, demonstrating tunability to various diffraction wavelengths. The nano FeO modified by polyvinylpyrrolidone (PVP) and silicon coated could be stably dispersed in a variety of organic solvents and thus diffracted different wavelengths under a magnetic field. This is expected to be applied in various scenarios in the field of optical color development.
在本文中，我们设计并研究了一种基于还原的方法，用于可控地合成用于磁响应光子晶体的单分散超顺磁性纳米FeO胶体团簇。结果表明，向体系中添加抗坏血酸（VC）可以合成单分散的超顺磁性纳米FeO，并避免γ-FeO杂质的产生，而纳米FeO的粒径和饱和磁化强度随着VC用量的增加而逐渐减小。纳米FeO在磁场作用下可迅速组装成光子晶体点阵结构，对各种衍射波长具有可调性。经聚乙烯吡咯烷酮（PVP）改性和硅包覆的纳米FeO可以稳定地分散在多种有机溶剂中，从而在磁场下衍射出不同的波长。这有望应用于光学显色领域的各种场景。
