利用微空间偏移拉曼光谱研究碳基颜料着色的层釉

IF 2.4 3区 化学 Q2 SPECTROSCOPY
Caroline Bouvier, Stephen R. Elliott
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引用次数: 0

摘要

半透明薄膜由不同的低浓度碳黑颜料堆叠层组成,这些碳黑颜料分散在模仿历史艺术家材料的绘画清漆中,就像通常与达芬奇艺术作品相关的 "Sfumato "技术一样。了解这种效果背后的结构有助于保护这类绘画。显微拉曼光谱是通常用于绘画材料的分析技术之一,已被证明适用于富含有机物的绘画中碳基颜料的检测和表征。我们根据历史资料中精选的配方制作了透明模型样品,并使用基于拉曼散射的实验技术进行分析,包括微空间偏移拉曼光谱(micro-SORS)。我们研究了不同浓度的单层釉料和模仿斯富马托釉料技术的多层系统。拉曼光谱检测颜料的性能在单层上进行了评估;根据颜料的浓度对光谱行为进行了描述。在多层系统上测试了微拉曼光谱技术,该技术似乎能够区分不同地层的样品,这些样品中相同碳基颜料的浓度各不相同,层的顺序也各不相同。这一概念验证观察结果很有希望。为了获得更多绘画材料模型的综合结果,尤其是混合了其他颜料的碳基材料模型的综合结果,还需要开展进一步的研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Investigation of layered glazes coloured with carbon-based pigments using micro spatially-offset Raman spectroscopy

Investigation of layered glazes coloured with carbon-based pigments using micro spatially-offset Raman spectroscopy

Non-invasive and non-destructive Raman spectroscopic techniques have been used to detect the stratigraphic variation of tints in semi-translucent films, comprising stacked layers with varying low concentrations of carbon-black pigment dispersed in a painting varnish imitating historical artist materials, as in the ‘Sfumato’ technique often associated with Leonardo da Vinci's works of art. Understanding the structures behind this effect could help to conserve such paintings. Micro-Raman spectroscopy is one of the analytical techniques usually applied to painting materials that has proved suitable for tackling the challenging detection and characterization of carbon-based pigments in organic-rich paintings. Model transparent samples have been fabricated following a selected recipe from historical sources and analysed using Raman-scattering-based experimental techniques, including micro-spatially offset Raman spectroscopy (micro-SORS). Single glaze layers spanning a range of concentrations, and multilayer systems mimicking the resulting stratigraphy of the Sfumato glaze technique, have been studied. Raman-spectroscopy performance to detect the pigment was assessed on the single layers; the spectral behaviour was characterized according to the concentration of pigment. The micro-SORS technique was tested on the multilayer systems and appears to be able to distinguish between different stratigraphic samples, varying in concentration of the same carbon-based pigment, and the order of layers. This proof-of-concept observation is promising. It calls for further studies to be undertaken to obtain comprehensive results about an increased number of model painting materials, especially for carbon-based materials mixed with other pigments.

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来源期刊
CiteScore
5.40
自引率
8.00%
发文量
185
审稿时长
3.0 months
期刊介绍: The Journal of Raman Spectroscopy is an international journal dedicated to the publication of original research at the cutting edge of all areas of science and technology related to Raman spectroscopy. The journal seeks to be the central forum for documenting the evolution of the broadly-defined field of Raman spectroscopy that includes an increasing number of rapidly developing techniques and an ever-widening array of interdisciplinary applications. Such topics include time-resolved, coherent and non-linear Raman spectroscopies, nanostructure-based surface-enhanced and tip-enhanced Raman spectroscopies of molecules, resonance Raman to investigate the structure-function relationships and dynamics of biological molecules, linear and nonlinear Raman imaging and microscopy, biomedical applications of Raman, theoretical formalism and advances in quantum computational methodology of all forms of Raman scattering, Raman spectroscopy in archaeology and art, advances in remote Raman sensing and industrial applications, and Raman optical activity of all classes of chiral molecules.
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