X-ray irradiation induced optical absorptions in silver and manganese doped soda-lime silicate glass
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Silver nanoclusters formation was observed in Ag-doped or Ag–Mn-doped soda-lime silicate glasses after X-ray irradiation followed by thermal annealing. Silver nanoclusters were formed with mean-size of about 3 nm after heating at 420 °C for 1 h in Ag-doped glass, and were disappeared after heating at 600 °C for 1 h. Mn3+ was formed in Mn-doped glass after X-ray irradiation followed by heating at 400 °C for 1 h, and was reduced to Mn2+ upon subsequently heating at 600 °C for 1 h. The presence of Mn3+ led to a purple color, while the silver nanoclusters provided a yellow color in the glass. The Ag-doped or Mn-doped glass may be viable as recyclable coloration glasses. In Ag–Mn-doped glass silver nanoclusters were formed only after heating at a high temperature of 600 °C following the irradiation. In addition, manganese showed a similar X-ray-induced behavior in the Mn-doped glass and the Ag–Mn-doped glass. In contrast, silver behaved differently in the Ag-doped glass and the Ag–Mn-doped glass. Unlike those in Ag-doped glass, the silver nanoclusters would not be dissolved in Ag–Mn-doped once they were formed.
KeywordsElectron Spin Resonance Electron Spin Resonance Spectrum Thermal Annealing Electron Spin Resonance Signal Ag2O
The author gratefully acknowledges the financial support for this work from Zhejiang Provincial Natural Science Foundation of China (R404108), Zhejiang Provincial Special Hired Professor Foundation, and Scientific Research Foundation of Zhejiang Provincial Education Department (20040556). Dr Bill X. Huang of NIH/NIAAA were acknowledged for the English improvement.
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