Copper-based opaque red glasses - Understanding the colouring mechanism of copper nanoparticles in archaeological glass samples
Copper-based opaque red glasses - Understanding the colouring mechanism of copper nanoparticles in archaeological glass samples
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DOI：
10.1016/j.optmat.2017.12.054
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发表时间：
2018-02-01
影响因子：
3.9
通讯作者：
Moncke, D.
中科院分区：
文献类型：
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作者：
Druenert, F.;Blanz, M.;Moncke, D.
对德国中部两个不同地点的红色不透明玻璃、陶努斯山脉格拉斯舒顿的中世纪玻璃厂和哈尔茨山脉维达的早期现代玻璃厂的光学外观进行了分析。扫描电子显微镜和X射线衍射分析表明，金属铜纳米颗粒是这些玻璃中的显著成分。此外，为了更好地了解制造过程，实验室中也复制了类似的不透明红色玻璃。为了评价铜纳米颗粒与其他可能的呈色原因在显色机理中的作用，对光散射进行了详细的分析，发现铜纳米颗粒与金属铜纳米颗粒的可能贡献存在明显的差异。通过模拟后向散射光谱，我们能够计算出考古玻璃样品中铜颗粒的平均半径，最高可达95 nm，与扫描电子显微镜的结果(最小65 nm)很好地吻合。使用我们在这项研究中应用的方法，有可能重建中世纪应用于这些特殊材料制造的各种工艺条件。(C)2018爱思唯尔B.V.保留所有权利。
Red opaque glasses of two different sites in central Germany, a medieval glassworks in Glashutten, Taunus Mountains, and an early modern glassworks in Wieda, Harz Mountains, were analysed with regard to their optical appearance. By scanning electron microscopy and X-ray diffraction, metallic copper nanoparticles were identified as a conspicuous constituent in these glasses. In addition, similar opaque red glasses were reproduced in the laboratory in order to better understand the manufacturing process. Detailed analysis of the optical scattering was conducted in order to evaluate the role of Cu-0 nanoparticles in the colouring mechanism relative to other possible reasons of colouration.We find clear differences between the possible contributions of Cu2O (cuprite) particles and metallic copper (Cu-0) nanoparticles. Through simulated backscattering spectra we were able to calculate an average copper particle radius in the archaeological glass samples resulting in a value of up to 95 nm, which matches well the results of SEM investigation (minimum 65 nm). Using the methods we applied in this study, it becomes possible to reconstruct various processing conditions as they were applied in medieval manufacture of these particular materials. (C) 2018 Elsevier B.V. All rights reserved.