The potential of Raman spectroscopy in glass studies
The potential of Raman spectroscopy in glass studies
复制标题
拉曼光谱在玻璃研究中的潜力
DOI：
10.1117/12.981648
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
H. Terryn
中科院分区：
文献类型：
--
作者：
K. Baert;W. Meulebroeck;A. Ceglia;H. Wouters;P. Cosyns;K. Nys;H. Thienpont;H. Terryn
拉曼光谱被认为是一种合适且快速的无损技术，用于获取各种来源的玻璃样品（古代和现代/工业玻璃）的定性信息。第一个应用是考古窗玻璃的广泛语料库，仍需要研究。对于许多遗址，考古学家必须处理大量出土的玻璃样本，并且有必要选择最合适的样本进行化学分析。可以根据拉曼光谱进行快速分类：不同种类的玻璃（碱玻璃、高石灰低碱玻璃（HLLA））都有自己典型的拉曼特征。即使对于发出强荧光的玻璃，在对拉曼数据进行简单处理后也可以进行分类。拉曼光谱也已被用来识别含铁玻璃。玻璃样品中铁含量的影响反映在拉曼光谱的拓扑结构上：可以看出二氧化硅四面体结构的 Q2/Q3 振动单元的比率之间存在很强的联系。如果考虑基质效应（类似的玻璃），甚至可以从校准线确定（半）定量结果。在琥珀色玻璃中，拉曼光谱中的额外峰值 ~415cm-1 表明存在 Fe-S 发色团。最后，在一些黄色和红色玻璃的荧光信号中，鉴定出了 Zn-Se-Cd-S 纳米晶体的两个峰。
Raman spectroscopy is presented as a suitable and fast non-destructive technique to obtain qualitative information about glass samples of various origins (ancient and modern/industrial glass). A first application is the broad corpus of archaeological window glass that still needs to be investigated. For many sites, archaeologists have to deal with large collections of excavated glass samples and a selection of the most appropriate samples for chemical analysis is necessary. A fast classification can be made based on Raman spectra: different kind of glasses (Alkali-glass, High Lime-Low Alkali glass (HLLA)) have their own typical Raman signature. Even for glasses giving strong fluorescence, a classification is possible after a simple treatment of the Raman data. Raman spectroscopy has also been utilized to identify iron containing glasses. The effect of the iron content in glass samples is reflected on the topology of the Raman spectra: a strong link between the ratio of the Q2/Q3 vibration units of the silica tetrahedral structure is seen. Even (semi-) quantitative results can be determined from calibration lines if matrix effects are taken into account (similar glasses). In amber colored glasses, an extra peak ~415cm-1 in the Raman spectra indicates the presence of a Fe-S chromophore. Finally, in the fluorescent signals of some yellow and red glasses two peaks of Zn-Se-Cd-S nanocrystals have been identified.