Stability of Silver Nanoparticles in Air：Fermi Level and Oxidation

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  • 大気中での銀ナノ粒子の安定性：フェルミ準位と酸化
  • タイキ チュウ デ ノ ギン ナノ リュウシ ノ アンテイセイ : フェルミ ジュンイ ト サンカ

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<p>The results in the previous paper [T. Tani, T. Uchida, Jpn. J. Appl. Phys., 54, 065001 (2015)] have revealed that gelatin has an ability to protect Ag nanoparticles from oxidation by keeping its Fermi level higher than that of the particles. In this paper, it has been indicated from experimental results that the Fermi level of surroundings of the grains is determined by active gases coming from air, and that components from air are repeatedly adsorbed and desorbed, forming their layer with limited thickness on the grain. The titration of aqueous solutions have revealed strong buffer activity of gelatin, which prevents the particles from being sharply influenced by the change in ambient condition.</p>

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