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Surface modification, adsorption behavior, and optical properties of α-Fe2O3@SiO2/Au core-shell ellipsoids
Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 4.9 ) Pub Date : 2021-05-26 , DOI: 10.1016/j.colsurfa.2021.126888
Xin Zhang , Xueyan Jia , Manyuan Li , Zihang Shi , Rui Xu , Jiupeng Zhao , Yongan Niu

α-Fe2O3@SiO2/Au core-shell ellipsoids, applied as the structural units of non-spherical photonic crystals, have the excellent monodispersity and self-assembly capacity. To improve the interfacial effect, the α-Fe2O3@SiO2 ellipsoids were modified by 3-aminopropyl triethoxysilane (APS) and used as the adsorption center of Au nanoparticles (NPs), which were synthesized by a sodium citrate reduction method. The adsorption behavior of α-Fe2O3@SiO2/Au ellipsoids was comprehensively investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The variations of optical properties were further evaluated by ultraviolet and visible (UV–vis) and Raman spectroscopy. The α-Fe2O3@SiO2/Au core-shell ellipsoids exhibited the excellent UV–vis absorption and Raman scattering effects, which were suggested to potentially apply in photothermal and photoelectric conversation.



中文翻译:

α-Fe 2 O 3 @SiO 2 /Au核壳椭球的表面改性、吸附行为和光学性质

α-Fe 2 O 3 @SiO 2 /Au核壳椭球体作为非球形光子晶体的结构单元,具有优异的单分散性和自组装能力。为了改善界面效应,α-Fe 2 O 3 @SiO 2椭球体被3-氨基丙基三乙氧基硅烷(APS)改性,并用作Au纳米颗粒(NPs)的吸附中心,这些纳米颗粒是通过柠檬酸钠还原法合成的。α-Fe 2 O 3 @SiO 2的吸附行为通过扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 对 /Au 椭球进行了全面研究。通过紫外和可见光(UV-vis)和拉曼光谱进一步评估了光学特性的变化。α-Fe 2 O 3 @SiO 2 /Au 核壳椭球表现出优异的紫外可见吸收和拉曼散射效应,被认为有可能应用于光热和光电对话。

更新日期:2021-05-30
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