Zinc oxide (ZnO) quantum dots (QDs) stabilized/functionalized with oleic acid and core-shelled with silicon dioxide (SiO₂) are presented. A colloidal route, free surfactant was followed to synthesize ZnO QDs with an average size of 5 nm. After, the ZnO QDs were stabilized with oleic acid to avoid aggregation followed by (3-aminopropyl) trimethoxysilane functionalization. The X-ray diffraction patterns and transmission electron microscopy results indicated that the ZnO QD size and morphology did not suffer any change after functionalization. In addition, the photoluminescence measurements showed a strong green emission band related to particle size and the shell formation. Moreover, the quantum yield and z potential values were determined and the results showed an enhanced for those ZnO@SiO₂ samples with 10 wt% of shell precursor. In this research, we report a high relationship between the stability and photoluminescence properties with the shell precursor concentration. Furthermore, we have developed a reliable method to obtain functionalized ZnO QDs which offer a great potential for future use as photoemission devices such as photonics, photocatalytic activities, biomedicine, optoelectronic devices, and chemical sensing.

提出了用油酸稳定/官能化并用二氧化硅（SiO ₂）核壳化的氧化锌（ZnO）量子点（QD）。遵循胶体路线的游离表面活性剂合成平均粒径为5 nm的ZnO QD。之后，将ZnO QD用油酸稳定，避免聚集，然后进行（3-氨基丙基）三甲氧基硅烷官能化。X射线衍射图谱和透射电子显微镜结果表明，功能化后ZnO QD的大小和形态没有任何变化。另外，光致发光测量显示出与颗粒尺寸和壳形成有关的强绿色发射带。而且，量子产率和z测定了电位值，结果表明，含有10 wt％壳前​​体的ZnO @ SiO ₂样品的电势增强。在这项研究中，我们报告了稳定性和光致发光特性与壳前体浓度之间的高度关系。此外，我们已经开发出一种可靠的方法来获得功能化的ZnO QD，这为将来用作光电子器件（如光子学，光催化活性，生物医学，光电器件和化学传感）提供了巨大的潜力。