Abstract In this study, the FePt core, ZnIn2S4 shell and FePt-ZnIn2S4 core-shell nanostructures were successfully synthesized using solvothermal process. Temperature dependent hysteresis behavior of as-synthesized nanoparticles (NPs) FePt and FePt/ZnIn2S4 showed super paramagnetic response at 300 K and ferromagnetic properties with a coercive field (Hc) of 2830 Oe and 970 Oe at 2 K, respectively. Also, the blocking temperature (TB) estimating by the peak in ZFC curves was about 26 K for FePt and about 46 K for FePt/ZnIn2S4 NPs. After the identification process of nanostructure, using electrochemical methods, the behavior of FePt-ZnIn2S4 core-shell@PGE was studied in 0.1 M phosphate buffer solution (PBS) containing 5.0 mM [Fe(CN)6]3−/4−. The EIS complex plane plots showed a drastic change in the charge transfer resistance of the probe redox reaction as a function of UO22+ concentration. This behavior was used for construction of the calibration curve, and a linear range from 0.5 to 10.0 μM UO22+ with a detection limit of 71.7 nM.

中文翻译：

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基于FePt/ZnIn 2 S 4 核壳半导体纳米结构的新型铀酰传感器的设计与开发

摘要 本研究采用溶剂热法成功合成了FePt核、ZnIn2S4壳和FePt-ZnIn2S4核壳纳米结构。合成后的纳米粒子 (NPs) FePt 和 FePt/ZnIn2S4 的温度依赖性磁滞行为在 300 K 下表现出超顺磁响应，在 2 K 下分别具有 2830 Oe 和 970 Oe 的矫顽场 (Hc) 的铁磁特性。此外，通过 ZFC 曲线中的峰值估计的阻塞温度 (TB) 对于 FePt 约为 26 K，对于 FePt/ZnIn2S4 NP 约为 46 K。在纳米结构的鉴定过程之后，使用电化学方法，在含有 5.0 mM [Fe(CN)6]3-/4- 的 0.1 M 磷酸盐缓冲溶液 (PBS) 中研究了 FePt-ZnIn2S4 核壳@PGE 的行为。EIS 复平面图显示探针氧化还原反应的电荷转移电阻随 UO22+ 浓度的变化而发生剧烈变化。该行为用于构建校准曲线，线性范围为 0.5 至 10.0 μM UO22+，检测限为 71.7 nM。