Abstract Herein, the effect of three types of capping polymers, mercaptopropionic acid (MPA), polyethylene glycol (PEG), and starch on the photoluminescence of Mn(2+)-doped ZnSe (ZnSe:Mn) nanoparticles, has been investigated. ZnSe:Mn nanoparticles were successfully prepared with a green method of precipitation in aqueous solutions containing MPA, PEG, or starch as stabilizers. The X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy had proved the formation of ZnSe:Mn particles and the interaction between them and the capping agents. The resultant nanoparticles with different capping polymers were identical in optical property; however, photoluminescence quantum yields (PLQY) as well as the photoluminescence lifetime varied by capping agents. Starch-capped ZnSe:Mn nanoparticles had the biggest size compared to others, which was confirmed using transmission electron microscopy, dynamic light scattering, UV-Vis absorbance and Raman spectroscopy. Also, the PL intensity was significantly enhanced with starch-capped ZnSe:Mn nanoparticles. The PLQYs of starch archived 26%, which was 1.23 or 1.8 times lower than that of ZnSe:Mn nanoparticles capping with MPA or PEG, respectively. Furthermore, the highest decline of PL intensity was detected in PEG, which completely diminished in the 19th week, while both MPA and starch endowed ZnSe:Mn nanoparticles with outstanding PL lifetimes diminished over seven weeks.

中文翻译：

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稳定剂对绿色法合成Mn ZnSe量子点的影响

摘要 本文研究了三种封端聚合物，巯基丙酸（MPA）、聚乙二醇（PEG）和淀粉对Mn(2+)掺杂的ZnSe（ZnSe:Mn）纳米粒子光致发光的影响。ZnSe:Mn 纳米颗粒采用绿色沉淀法在含有 MPA、PEG 或淀粉作为稳定剂的水溶液中成功制备。X射线光电子能谱和傅里叶变换红外光谱证明了ZnSe:Mn颗粒的形成以及它们与封端剂之间的相互作用。所得具有不同封端聚合物的纳米粒子在光学性质上是相同的；然而，光致发光量子产率（PLQY）以及光致发光寿命因封端剂而异。淀粉封端的 ZnSe：与其他纳米粒子相比，Mn 纳米粒子的尺寸最大，这通过透射电子显微镜、动态光散射、紫外-可见吸收和拉曼光谱得到证实。此外，用淀粉封端的 ZnSe:Mn 纳米粒子显着增强了 PL 强度。淀粉的 PLQY 为 26%，分别比用 MPA 或 PEG 封端的 ZnSe:Mn 纳米粒子低 1.23 或 1.8 倍。此外，在 PEG 中检测到 PL 强度下降幅度最大，在第 19 周完全减弱，而 MPA 和淀粉赋予 ZnSe:Mn 纳米颗粒具有出色的 PL 寿命则在 7 周内减弱。锰纳米粒子。淀粉的 PLQY 为 26%，分别比用 MPA 或 PEG 封端的 ZnSe:Mn 纳米粒子低 1.23 或 1.8 倍。此外，在 PEG 中检测到 PL 强度下降幅度最大，在第 19 周完全减弱，而 MPA 和淀粉赋予 ZnSe:Mn 纳米颗粒具有出色的 PL 寿命则在 7 周内减弱。锰纳米粒子。淀粉的 PLQY 为 26%，分别比用 MPA 或 PEG 封端的 ZnSe:Mn 纳米粒子低 1.23 或 1.8 倍。此外，在 PEG 中检测到 PL 强度下降幅度最大，在第 19 周完全减弱，而 MPA 和淀粉赋予 ZnSe:Mn 纳米颗粒具有出色的 PL 寿命则在 7 周内减弱。