Effect of silver doping on the elastic properties of CdS nanoparticles
Effect of silver doping on the elastic properties of CdS nanoparticles
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DOI：
10.1007/s12648-018-1214-4
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发表时间：
2018-09-01
影响因子：
2
通讯作者：
Das, R.
中科院分区：
文献类型：
--
作者：
Dey, P. C.;Das, R.
CdS 和 Ag 掺杂的 CdS (CdS/Ag) 纳米颗粒是通过化学方法由醋酸镉前体和硫脲制备的。合成的 CdS 和 CdS/Ag 纳米颗粒已通过 X 射线衍射和高分辨率透射电子显微镜进行了表征。在这里，这些纳米颗粒是在室温下合成的，并且所有表征也仅在室温下完成。 XRD结果表明产物为立方闪锌矿结构结晶。 HRTEM 图像显示所制备的纳米颗粒形状接近球形。 Williamson-Hall 方法和尺寸应变图 (SSP) 已用于研究晶体尺寸和晶格应变对 CdS 和 CdS/Ag 纳米颗粒峰展宽的单独贡献。采用Williamson-Hall方法的不同修正模型，如均匀变形模型、均匀应力变形模型和均匀能量密度变形模型以及SSP方法，计算了对应于CdS和银掺杂CdS（CdS/Ag）的所有衍射峰的晶格应变、应力和能量密度等不同物理参数。所得结果表明，根据 HRTEM 图像、Williamson-Hall 分析和 SSP 方法估算的所制备的 CdS 和 CdS/Ag 纳米颗粒的平均粒径彼此高度相关。此外，所有这些结果证实Ag的掺杂显着影响CdS的弹性性能。
CdS and Ag doped CdS (CdS/Ag) nanoparticles have been prepared via chemical method from a Cadmium acetate precursor and Thiourea. The synthesized CdS and CdS/Ag nanoparticles have been characterized by the X-ray Diffraction and High Resolution Transmission Electron Microscope. Here, these nanoparticles have been synthesized at room temperature and all the characterization have also been done at room temperature only. The XRD results reveal that the products are crystalline with cubic zinc blende structure. HRTEM images show that the prepared nanoparticles are nearly spherical in shape. Williamson-Hall method and Size-Strain Plot (SSP) have been used to study the individual contribution of crystalline sizes and lattice strain on the peak broadening of the CdS and CdS/Ag nanoparticles. The different modified model of Williamson-Hall method such as, uniform deformation model, uniform stress deformation model and uniform energy density deformation model and SSP method have been used to calculate the different physical parameter such as lattice strain, stress and energy density for all diffraction peaks of the XRD, corresponding to the CdS and silver doped CdS (CdS/Ag). The obtained results reveal that the average particle size of the prepared CdS and CdS/Ag nanoparticles estimated from the HRTEM images, Williamson-Hall analysis and SSP method are highly correlated with each other. Further, all these result confirms that doping of Ag significantly affects the elastic properties of CdS.