A reverse micelle microemulsion assisted hydrothermal approach has been developed for synthesizing iron (Fe²⁺) doped ZnSe nanocrystals (NCs). The synthetic process contains a two-step procedure, a chemical reaction between Zn²⁺ and Se using a reducing agent NaBH₄ in a Triton X-100 surfactant contained microemulsion, followed by a hydrothermal treatment. The ZnSe NCs have a well-defined crystallinity and the Fe²⁺ ions have been effectively incorporated into the ZnSe matrix as shown by the compositional mappings from scanning transmission electron microscope (STEM). As revealed by transmission electron microscope (TEM) and powder X-ray diffraction (XRD), the as-synthesized nanocrystals have a cubic zinc blende ZnSe structure with high purity and homogeneity. The sizes of the as-synthesized ZnSe:Fe NCs can be well controlled by changing temperature in the hydrothermal treatment procedure. If the temperature in the hydrothermal system is set lower, the synthesized NCs can be rendered smaller. The size of the ZnSe NCs can be controlled over a wide range from 3.6 nm to 10.4 nm with the temperature range from 90 °C to 140 °C, respectively. The correlation of NC size versus temperature is nearly linear, which can be used to predict and tune NC sizes. This manuscript reports for the first time that the size of Fe²⁺ doped ZnSe nanocrystals can be controlled by hydrothermal treatment after synthesis via a microemulsion process. Controlling size of the ZnSe:Fe nanocrystals is critical for developing new sensor materials and mid-infrared laser media in the infrared region based on tunable optical properties of the nanomaterials.

反胶束微乳液辅助水热方法已被开发用于合成铁 (Fe ²⁺ ) 掺杂的 ZnSe 纳米晶体 (NCs)。合成过程包含两步程序，在含有微乳液的 Triton X-100 表面活性剂中使用还原剂 NaBH ₄在Zn ²⁺和 Se之间进行化学反应，然后进行水热处理。ZnSe NCs 具有明确的结晶度，而 Fe ²⁺如扫描透射电子显微镜 (STEM) 的成分映射所示，这些离子已有效地结合到 ZnSe 基质中。透射电子显微镜 (TEM) 和粉末 X 射线衍射 (XRD) 显示，合成的纳米晶体具有立方闪锌矿 ZnSe 结构，具有高纯度和均匀性。通过改变水热处理过程中的温度，可以很好地控制合成的 ZnSe:Fe NCs 的尺寸。如果水热系统中的温度设置得较低，合成的 NCs 可以变得更小。ZnSe NCs 的尺寸可以控制在 3.6 nm 到 10.4 nm 的宽范围内，温度范围分别为 90 °C 到 140 °C。NC 尺寸与温度的相关性接近线性，可用于预测和调整 NC 尺寸。²⁺掺杂的 ZnSe 纳米晶体可以通过微乳液工艺合成后通过水热处理进行控制。基于纳米材料的可调光学特性，控制 ZnSe:Fe 纳米晶体的尺寸对于开发新的传感器材料和红外区域中的中红外激光介质至关重要。