STABILITY OF SYNTHESIZED SILVER NANOPARTICLES IN CITRATE AND MIXED GELATIN/CITRATE SOLUTION

Authors

  • Jana Kavuličová Institute of Metallurgy, Faculty of Materials, Metallurgy and Recycling, Technical University of Kosice, Slovakia
  • Anna Mražíková Institute of Materials, Faculty of Materials, Metallurgy and Recycling, Technical University of Kosice, Slovakia
  • Oksana Velgosová Institute of Materials, Faculty of Materials, Metallurgy and Recycling, Technical University of Kosice, Slovakia
  • Dana Ivánová Institute of Metallurgy, Faculty of Materials, Metallurgy and Recycling, Technical University of Kosice, Slovakia
  • Martina Kubovčíková Institute of Experimental Physics, Slovak Academy of Sciences, Kosice, Slovakia

DOI:

https://doi.org/10.14311/AP.2018.58.0104

Keywords:

silver nanoparticles, sodium citrate, gelatin, size, stability

Abstract

The study focuses on an investigation of the influence of both citrate and mixed gelatin/citrate as a reductant and stabilizer on the colloidal stability of silver nanoparticles (AgNPs)synthesized by a chemical reduction of Ag+ ions after a short - (7th day) - and long - (118th day) - term storage. Formed AgNPs were characterized by a UV–vis Spectroscopy, Transmission Electron Microscope (TEM), Dynamic light scattering (DLS) and Zeta-potential (ZP). The obtained results revealed that a short-term stability of the synthesized AgNPs was greatly influenced by a citrate stabilizer with the absence of gelatin. Smaller-sized AgNPs (average particle diameter of 3 nm), roughly spherical in a shape, were obtained with a narrow size distribution. The very negative value of the Zeta-potential confirmed a strong stability of the citrate capped AgNPs. However, a surface coating of the AgNPs by a gelatin/citrate stabilizer was found to be a dominant contributor in improving a long-term stability of the AgNPs (average particle diameter of 26 nm). The use of gelatin in mixed stabilizer solution provided the AgNPs with higher monodispersity and a controllable size after both the short and long-term storage.

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Published

2018-04-30

Issue

Vol. 58 No. 2 (2018)

Section

Articles

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How to Cite

Kavuličová, J., Mražíková, A., Velgosová, O., Ivánová, D., & Kubovčíková, M. (2018). STABILITY OF SYNTHESIZED SILVER NANOPARTICLES IN CITRATE AND MIXED GELATIN/CITRATE SOLUTION. Acta Polytechnica, 58(2), 104-108. https://doi.org/10.14311/AP.2018.58.0104