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Magnetic Structured Nickel Core-Shell @ Silica/PMMA Nanocomposites from Synthesis to Applications
Journal of Inorganic and Organometallic Polymers and Materials ( IF 4 ) Pub Date : 2020-01-17 , DOI: 10.1007/s10904-020-01445-5 Dalia E. Abulyazied , H. M. Abomostafa , G. M. El komy
Journal of Inorganic and Organometallic Polymers and Materials ( IF 4 ) Pub Date : 2020-01-17 , DOI: 10.1007/s10904-020-01445-5 Dalia E. Abulyazied , H. M. Abomostafa , G. M. El komy
Incorporating Ni@SiO2 nanoparticles on poly-methyl methacrylate (PMMA) can alter electrical, optical, and magnetic properties of Ni nanoparticles to be used for energy storage applications, photo electronic devices and spintronic applications. The Ni@SiO2/PMMA nanocomposite samples are prepared by casting method. The morphology of the prepared nanoparticles was examined through high resolution transition electron microscope revealed the formation of SiO2 coating on ni nanoparticles. Furthermore, the topography of nanocomposites was characterized by the field emission scanning electron microscope. We investigated the formation of crystalline phase of Ni nanoparticles through X-ray diffraction. The Complex dielectric permittivity, electrical conductivity, electric modulus and impedance spectra of the PNC films were investigated in the frequency range from 0.1 Hz to 10 MHz. The real and imaginary parts of the permittivity decrease with increasing frequency due to an increase in Ni@SiO2 content. All the nanocomposites showed relatively low conductivity values and high impedance that could be used for nano-dielectrics. UV–Vis spectrophotometer was used to measure optical properties such as transmittance, and absorbance at normal incidence in the wavelength range of 200–1100 nm. The transmittance was found to decrease while the absorbance increases with increasing Ni@SiO2 nanoparticles. The indirect optical band gap of the composite films was calculated, and it was sharply decreased. Magnetic hysteresis plots at room temperature of composites Ni@SiO2/PMMA were studied. All samples demonstrate ferromagnetic behavior with well pronounced magnetic hysteresis.
中文翻译:
磁性结构镍核-壳@二氧化硅/ PMMA纳米复合材料从合成到应用
将Ni @ SiO 2纳米粒子结合到聚甲基丙烯酸甲酯(PMMA)上可以改变镍纳米粒子的电,光和磁性能,这些纳米粒子可用于储能,光电器件和自旋电子学。采用流延法制备了Ni @ SiO 2 / PMMA纳米复合材料样品。通过高分辨率的过渡电子显微镜检查了制备的纳米颗粒的形貌,揭示了SiO 2的形成在镍纳米颗粒上的涂层。此外,通过场发射扫描电子显微镜表征了纳米复合材料的形貌。我们通过X射线衍射研究了镍纳米粒子的结晶相的形成。在0.1 Hz至10 MHz的频率范围内研究了PNC薄膜的复介电常数,电导率,电模量和阻抗谱。由于Ni @ SiO 2的增加,介电常数的实部和虚部随频率的增加而减小内容。所有的纳米复合材料均显示出较低的电导率值和较高的阻抗,可用于纳米电介质。紫外可见分光光度计用于测量光学特性,例如在200–1100 nm波长范围内法向入射时的透射率和吸收率。发现随着Ni @ SiO 2纳米颗粒的增加,透射率降低而吸收率增加。计算了复合膜的间接光学带隙,该带隙急剧减小。研究了复合材料Ni @ SiO 2 / PMMA在室温下的磁滞曲线。所有样品均表现出铁磁行为,并具有明显的磁滞现象。
更新日期:2020-01-17
中文翻译:
磁性结构镍核-壳@二氧化硅/ PMMA纳米复合材料从合成到应用
将Ni @ SiO 2纳米粒子结合到聚甲基丙烯酸甲酯(PMMA)上可以改变镍纳米粒子的电,光和磁性能,这些纳米粒子可用于储能,光电器件和自旋电子学。采用流延法制备了Ni @ SiO 2 / PMMA纳米复合材料样品。通过高分辨率的过渡电子显微镜检查了制备的纳米颗粒的形貌,揭示了SiO 2的形成在镍纳米颗粒上的涂层。此外,通过场发射扫描电子显微镜表征了纳米复合材料的形貌。我们通过X射线衍射研究了镍纳米粒子的结晶相的形成。在0.1 Hz至10 MHz的频率范围内研究了PNC薄膜的复介电常数,电导率,电模量和阻抗谱。由于Ni @ SiO 2的增加,介电常数的实部和虚部随频率的增加而减小内容。所有的纳米复合材料均显示出较低的电导率值和较高的阻抗,可用于纳米电介质。紫外可见分光光度计用于测量光学特性,例如在200–1100 nm波长范围内法向入射时的透射率和吸收率。发现随着Ni @ SiO 2纳米颗粒的增加,透射率降低而吸收率增加。计算了复合膜的间接光学带隙,该带隙急剧减小。研究了复合材料Ni @ SiO 2 / PMMA在室温下的磁滞曲线。所有样品均表现出铁磁行为,并具有明显的磁滞现象。