Depth profiles of Ag nanoparticles in silicate glass |
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Authors: | Xiuchun Yang Weijie Li Zhihui Li Yanan Wei Wenhai Huang |
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Institution: | (1) School of Materials Science and Engineering, Tongji University, Shanghai, 200092, P.R. China |
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Abstract: | Silver nanoparticle composite glass has been synthesized by ion exchange and a subsequent thermal treatment method. Transmission
electron microscopy (TEM) and ultraviolet-visible spectrometry were used to study the depth profiles of Ag nanoparticles in
silicate glass. Results indicate that Ag nanoparticles are nearly spherical in shape with a single-crystalline structure.
Also, the volume fraction of Ag nanoparticles is very high in the surface layer of 5 μm, and then decreases slowly across
the depth of 30 μm, thereafter the volume fraction reduces quickly to zero at the depth of 100 μm. The plasmon resonance bi-absorptions
in the surface layer of the annealed specimen at 600 °C can be attributed to bi-modal distributions of Ag nanoparticles in
the layer. The bi-modal distributions can be explained by the Ostwald ripening theory.
PACS 81.05.Pj; 81.07.-b; 68.37.Lp |
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