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Volume 24 Issue 10
Oct.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(10): 1177-1182
Oksana Velgosova, Elena Čižmárová, Jaroslav Málek,  and Jana Kavuličova, Effect of storage conditions on long-term stability of Ag nanoparticles formed via green synthesis, Int. J. Miner. Metall. Mater., 24(2017), No. 10, pp. 1177-1182. https://doi.org/10.1007/s12613-017-1508-0
Cite this article as:
Oksana Velgosova, Elena Čižmárová, Jaroslav Málek,  and Jana Kavuličova, Effect of storage conditions on long-term stability of Ag nanoparticles formed via green synthesis, Int. J. Miner. Metall. Mater., 24(2017), No. 10, pp. 1177-1182. https://doi.org/10.1007/s12613-017-1508-0
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研究论文

Effect of storage conditions on long-term stability of Ag nanoparticles formed via green synthesis

  • Institute of Materials, Faculty of Metallurgy, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia

  • Department of Materials Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Karlovo nám. 13, 121 32 Prague 2, Czech Republic

  • Institute of Metallurgy, Faculty of Metallurgy, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia

  • 通讯作者:

    Oksana Velgosova    E-mail: oksana.velgosova@tuke.sk

  • Spherical Ag nanoparticles (AgNPs) with a diameter of 20 nm or smaller were biologically synthesized using algae Parachlorella kessleri. The effect of storage conditions on the long-term stability of AgNPs was investigated. UV/Vis spectrophotometry, transmission electron microscopy, and dynamic light scattering measurements revealed that the long-term stability of AgNPs was influenced by light and temperature conditions. The most significant loss of stability was observed for the AgNPs stored in daylight at room temperature. The AgNPs stored under these conditions began to lose their stability after approximately 30 d; after 100 d, a substantial amount of agglomerated particles settled to the bottom of the Erlenmeyer flask. The AgNPs stored in the dark at room temperature exhibited better long-term stability. Weak particle agglomeration began at approximately the 100th day. The AgNPs stored in the dark at about 5℃ exhibited the best long-term stability; the AgNPs stored under such conditions remained spherical, with a narrow size distribution, and stable (no agglomeration) even after 6 months. Zeta-potential measurements confirmed better dispersity and stability of AgNPs stored under these conditions.
    • Research Article

    Effect of storage conditions on long-term stability of Ag nanoparticles formed via green synthesis

    + Author Affiliations
      Abstract
    • Spherical Ag nanoparticles (AgNPs) with a diameter of 20 nm or smaller were biologically synthesized using algae Parachlorella kessleri. The effect of storage conditions on the long-term stability of AgNPs was investigated. UV/Vis spectrophotometry, transmission electron microscopy, and dynamic light scattering measurements revealed that the long-term stability of AgNPs was influenced by light and temperature conditions. The most significant loss of stability was observed for the AgNPs stored in daylight at room temperature. The AgNPs stored under these conditions began to lose their stability after approximately 30 d; after 100 d, a substantial amount of agglomerated particles settled to the bottom of the Erlenmeyer flask. The AgNPs stored in the dark at room temperature exhibited better long-term stability. Weak particle agglomeration began at approximately the 100th day. The AgNPs stored in the dark at about 5℃ exhibited the best long-term stability; the AgNPs stored under such conditions remained spherical, with a narrow size distribution, and stable (no agglomeration) even after 6 months. Zeta-potential measurements confirmed better dispersity and stability of AgNPs stored under these conditions.
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