We report on the successful synthesis of CdSe nanoparticles (NPs) via a facile aqueous approach. Investigation on the effects of various cadmium sources in the precursor solution on the CdSe NPs is discussed. The structural and morphological properties characterized by the X‐ray diffraction (XRD) and scanning electron microscope (SEM) displayed good features of the as‐prepared CdSe NPs. The XRD pattern displayed a pure zinc blende crystal structure for all samples, with the most crystalline sample observed for CdSe NPs prepared using anhydrous cadmium chloride. The estimated crystallite sizes were below 6 nm for all the CdSe NPs samples. Mixed shapes of spherical and nanorods of varying sizes were observed from the SEM images for the as‐prepared NPs prepared using different cadmium sources. The optical studies conducted by photo‐spectroscopy pointed out the CdSe NPs prepared using anhydrous cadmium chloride gave the best optical properties. The emission wavelengths were in the range 565 to 574 nm while the optical band gaps were in the range 2.94 to 3.23 eV for all the as‐prepared CdSe NPs samples. All the samples, however, displayed quantum confinement effects giving room for further fabrication and engineering to suit specific applications in the biological field. The obtained results demonstrated that aqueous phase synthetic route employed in this study could be successfully adopted for production of high‐quality CdSe NPs because of its facile and inexpensive nature.

中文翻译：

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通过简便的合成途径生产的新型CdSe纳米颗粒的结构和光学性质：镉源效应的研究

我们报告了通过简便的水性方法成功合成CdSe纳米粒子（NPs）。讨论了前驱体溶液中各种镉源对CdSe NPs的影响。X射线衍射（XRD）和扫描电子显微镜（SEM）表征的结构和形态特性显示了所制备的CdSe NP的良好特性。XRD图谱显示所有样品均具有纯锌共混物晶体结构，使用无水氯化镉制备的CdSe NPs观察到的晶体样品最多。所有CdSe NPs样品的估计微晶尺寸均在6 nm以下。对于使用不同镉源制备的NP，从SEM图像中观察到大小不同的球形和纳米棒的混合形状。通过光谱学进行的光学研究指出，使用无水氯化镉制备的CdSe NP具有最佳的光学性能。对于所有准备好的CdSe NPs样品，发射波长在565至574 nm范围内，而光学带隙在2.94至3.23 eV范围内。但是，所有样品均显示出量子限制效应，为进一步制造和工程化提供了空间，以适应生物领域的特定应用。所得结果表明，本研究中采用的水相合成路线因其价格便宜且价格便宜而可以成功地用于生产高质量的CdSe NP。对于所有准备好的CdSe NPs样品，发射波长在565至574 nm范围内，而光学带隙在2.94至3.23 eV范围内。然而，所有样品均显示出量子限制效应，为进一步制造和工程设计提供了空间，以适应生物领域的特定应用。所得结果表明，本研究中采用的水相合成路线因其价格便宜且价格便宜而可以成功地用于生产高质量的CdSe NP。对于所有准备好的CdSe NPs样品，发射波长在565至574 nm范围内，而光学带隙在2.94至3.23 eV范围内。但是，所有样品均显示出量子限制效应，为进一步制造和工程化提供了空间，以适应生物领域的特定应用。所得结果表明，本研究中采用的水相合成路线因其价格便宜且价格便宜而可以成功地用于生产高质量的CdSe NP。