فهرست مقالات plasmonic properties

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  1 - Photoluminescence study of Au-Ag bimetallic nanoparticles supported on mesoporous silica SBA-15
  Saba Estakhri Elham Darabi Behrouz Akbari Adergani Seyed Elahi
  10.30495/jtap.162229
  Bimetallic Au-Ag nanoparticles with homogeneous dispersion in amine-modified SBA-15 mesoporous silica channels were successfully synthesized by the post-modification method. The obtained nanocomposites with different component ratios were studied by structural, Physico- چکیده کامل

  Bimetallic Au-Ag nanoparticles with homogeneous dispersion in amine-modified SBA-15 mesoporous silica channels were successfully synthesized by the post-modification method. The obtained nanocomposites with different component ratios were studied by structural, Physico-chemical, and optical analysis. The structural and Physico-chemical properties were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and nitrogen adsorption-desorption isotherm measurement (BET). The optical properties were characterized by photoluminescence (PL) and UV-Vis spectroscopy. The photoluminescence and absorption spectra were strongly affected by the change in the compositional ratio of gold to silver nanoparticles due to the interactions of Au-Ag nanoparticles, the configuration of conduction electrons and their plasmonic properties. A significant enhancement was observed in the photoluminescence spectrum in the long-wavelength red emission at 640 nm for a one-to-one composition ratio of Au/Ag/SBA-15 nanocomposite. Since the light emission of most microorganisms is in the visible range, the nanocomposite produced can be proposed for applications in biosensor technology. پرونده مقاله
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  2 - Magneto-plasmonic properties of hybrid nanostructures prepared by laser ablation in different solutions
  R. A. Ejbarah Ahmed K. Kodeary Talib M. Abbas
  10.57647/J.JTAP.2023.1705.49
  The present experimental study aims to synthesize and evaluate the magneto-plasmonic properties of metallic nanoparticles to introduce a hybrid of core-shell nanoparticle that can be used in biomedical and optical applications. For these core-shell nanoparticles, gold ( چکیده کامل

  The present experimental study aims to synthesize and evaluate the magneto-plasmonic properties of metallic nanoparticles to introduce a hybrid of core-shell nanoparticle that can be used in biomedical and optical applications. For these core-shell nanoparticles, gold (Au) was used as the plasmonic material and iron (Fe) as the partner in the magnetic parts. The core-shell nanoparticles were prepared by pulsed laser ablation in liquid media using a Nd:YAG pulsed laser in deionized water, as well as an aqueous solution of PVP, and for comparison an aqueous solution of PVA. Furthermore, the plasmonic and magnetic properties of the experimentally prepared core-shell nanoparticles were studied by optical spectroscopy and the vibrating sample magnetometer method within a variable magnetic field of up to 1 T. The results revealed tunable and adjustable optical linear behavior and obvious plasmonic properties by tracking the refractive index under different physical media. The results also showed that Superparamagnetic properties of core/shell nanoparticles were achieved by changing the surrounding medium. Accordingly, the results could open up new insight into the magneto-plasmonic region for beneficial biomedical applications. پرونده مقاله