Spectral-Luminescence Properties of Water Dispersions of CdS and Ag Nanoparticles Stabilized with Na2SiO3

Alexander A. Biryukov; Ekaterina Gotovtseva; Valery A. Svetlichnyi

doi:10.4028/www.scientific.net/KEM.683.325

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 683Spectral-Luminescence Properties of Water...

Spectral-Luminescence Properties of Water Dispersions of CdS and Ag Nanoparticles Stabilized with Na₂SiO₃

Abstract:

It was shown, that using of sodium metasilicate (Na₂SiO₃) as stabilizing agent for CdS quantum dots or Ag nanoparticles in water leads to the formation of stable colloids of CdS/SiO₃^2- and Ag/SiO₃²^- particles. These colloids are active in the visible range of the spectrum. According to TEM and UV-visible spectroscopy data, an average size of the particles in colloids was ∼ 5 nm for CdS and 2-10 nm for Ag. Ag/SiO₃^2- water colloids showed an absorption band with a maximum at 380-410 nm. This band belonged to surface plasmon resonance. CdS/SiO₃^2- water dispersions were characterized by luminescence at the region of 500-800 nm. The luminescence intensity increased after addition of Ag⁺ into the colloids of CdS/SiO₃^2-.

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Periodical:

Key Engineering Materials (Volume 683)

Pages:

325-330

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.683.325

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Online since:

February 2016

Authors:

Alexander A. Biryukov, Ekaterina Gotovtseva*, Valery A. Svetlichnyi

Keywords:

Absorbance, Luminescence, Nanoparticles of Cadmium Sulfide, Silver Nanoparticles, Sodium Metasilicate, Stabilization, Surface Plasmon Resonance

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