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Structural and spectroscopic studies of thin film of silver nanoparticles

机译：银纳米颗粒薄膜的结构和光谱研究

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摘要

We report the deposition of thin film of silver (Ag) nanoparticles by wet chemical method. The as-synthesized Ag nanoparticles have been characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), X-ray energy dispersive spectroscopy (EDS), field emission transmission electron microscopy (FETEM) and high-resolution TEM (HRTEM), UV-vis spectroscopy and thermogravimetric-differential thermal analysis (TG-DTA) respectively. FESEM image indicates that the silver film prepared on the quartz substrate is smooth and dense. XRD pattern reveals the face-centered cubic (fee) structure of silver nanoparticles. EDS spectrum indicates that samples are nearly stoichio-metric. From TEM analysis, it is found that the size of high purity Ag nanoparticles is ranging from 10 to 20 nm with slight agglomeration. Absorption in UV-vis region by these nanoparticles is characterized by the features reported in the literature, namely, a possible Plasmon peak at ~403 nm. Optical absorbance spectra analysis reveals that the Ag film has an indirect band structure with bandgap energy 3.88 eV. TGA/DTA studies revealed that a considerable weight loss occurs between 175 and 275°C; and the reaction is exothermic.
机译：我们报告了通过湿化学方法沉积的银（Ag）纳米颗粒薄膜。通过X射线衍射（XRD），场发射扫描电子显微镜（FESEM），X射线能量色散光谱（EDS），场发射透射电子显微镜（FETEM）和高分辨率TEM对合成的Ag纳米颗粒进行了表征（HRTEM），紫外可见光谱和热重差热分析（​​TG-DTA）。 FESEM图像表明在石英基板上制备的银膜是光滑且致密的。 XRD图谱显示了银纳米颗粒的面心立方（费）结构。 EDS光谱表明样品几乎是化学计量的。通过TEM分析，发现高纯度Ag纳米颗粒的尺寸在10至20nm的范围内，并且具有轻微的团聚。这些纳米颗粒在紫外线可见区域的吸收特征在于文献报道的特征，即〜403 nm处可能存在等离子峰。光吸收光谱分析表明，Ag膜具有带隙能为3.88eV的间接带结构。 TGA / DTA研究表明，在175至275°C之间会发生相当大的重量损失；反应是放热的

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  • 来源
    《Applied Surface Science》 |2011年第24期|p.10607-10612|共6页
  • 作者

    MA Majeed Khan; Sushil Kumar; Maqusood Ahamed; Salman A. Alrokayan; M.S. Alsalhi; Mansour Alhoshan; A.S. Aldwayyan;

  • 作者单位

    King Abdullah Institute for Nanotechnology, KingSaud University, Riyadh, 11451, Saudi Arabia;

    Department of Physics, Chaudhary Devi Lai University, Sirsa, 125055, India;

    King Abdullah Institute for Nanotechnology, KingSaud University, Riyadh, 11451, Saudi Arabia;

    King Abdullah Institute for Nanotechnology, KingSaud University, Riyadh, 11451, Saudi Arabia;

    King Abdullah Institute for Nanotechnology, KingSaud University, Riyadh, 11451, Saudi Arabia ,Department of Physics and Astronomy, King Saud University, Riyadh, 11451, Saudi Arabia;

    King Abdullah Institute for Nanotechnology, KingSaud University, Riyadh, 11451, Saudi Arabia ,Chemical Engineering Department, KingSaud University, Riyadh, 11451, Saudi Arabia;

    King Abdullah Institute for Nanotechnology, KingSaud University, Riyadh, 11451, Saudi Arabia ,Department of Physics and Astronomy, King Saud University, Riyadh, 11451, Saudi Arabia;

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  • 正文语种 eng
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  • 关键词

    thin film chemical synthesis silver nanoparticles scanning and transmission electron microscopy optical properties;

    机译：薄膜化学合成银纳米粒子扫描和透射电子显微镜光学性质;

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