Application of surface-enhanced Raman scattering (SERS) for the identification of anthraquinone dyes used in works of art
Application of surface-enhanced Raman scattering (SERS) for the identification of anthraquinone dyes used in works of art
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DOI：
10.1002/jrs.1426
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发表时间：
2006-04-01
影响因子：
2.5
通讯作者：
Vo-Dinh, T
中科院分区：
文献类型：
--
作者：
Chen, K;Leona, M;Vo-Dinh, T
研究了表面增强拉曼散射（Sers）技术在艺术品中常用的蒽醌染料分析中的应用，建立了两种Sers方法，并对茜素、胭脂红酸和紫胶三种常用蒽醌染料进行了评价。第一种方法是将一层银纳米颗粒直接涂覆在用感兴趣的染料染色的滤纸片上，通过热蒸发来诱导Sers效应。在第二种方法中，通过将氧化铝纳米颗粒层旋涂到载玻片上以提供基底的纳米结构，然后在氧化铝层的顶部热蒸发银纳米颗粒层来制备SERS活性Ag-Al 2 O3基底。将染料溶液的等分试样递送到该基底上以进行分析。利用这两种方法分别获得了茜素、胭脂红酸和紫胶染料的强Sers光谱。以茜素为模型化合物，考察了氧化铝悬浮液浓度和银纳米颗粒层厚度两个参数对Ag-Al_2 O_3基底性能的影响。对Ag-Al_2 O_3基底和Tollens反应制备的Sers基底进行了比较研究。的Ag-Al 2 O3基板被证明提供更大的增强和改善的再现性比Tollens基板。最后，通过对一小片用传统方法和材料染色的纺织品中提取的茜素的鉴定，说明了Ag-Al 2 O3基底用于分析真实的人工制品的潜在适用性。根据对已知浓度溶液进行的检测，茜素的检测限估计为7 × 10（-15）g。版权所有（c）2005年约翰威利父子有限公司。
Surface-enhanced Raman scattering (SERS) was investigated for applications in the analysis of anthraquinone dyes used in works of art. Two SERS procedures were developed and evaluated with three frequently used anthraquinone dyes, alizarin, carminic acid and lac dye. The first procedure involves coating a layer of silver nanoparticles directly on pieces of filter paper stained with the dyes of interest by thermal evaporation to induce SERS effect. In the second procedure, a SERS-active Ag-Al2O3 substrate was prepared by spin-coating an alumina-nanoparticle layer onto a glass slide to provide the nanostructure of the substrate, followed by thermally evaporating a layer of silver nanoparticles on top of the alumina layer. Aliquots of dye solutions were delivered onto this substrate to be analyzed. Intense SERS spectra characteristic of alizarin, carminic acid and lac dye were obtained using both SERS procedures. The effects of two parameters, the concentration of the alumina suspension and the thickness of the silver nanoparticle layer on the performance of the Ag-Al2O3 substrate were examined with alizarin as the model compound. Comparative studies were conducted between the Ag-Al2O3 substrate and the SERS substrate prepared using Tollens reaction. The Ag-Al2O3 substrate was shown to offer larger enhancement and improved reproducibility than the Tollens substrates. Finally, the potential applicability of the Ag-Al2O3 substrate for the analysis of real artifact objects was illustrated by the identification of alizarin extracted from a small piece of textile dyed using traditional methods and materials. The limit of detection for alizarin was estimated to be 7 x 10(-15) g from tests performed on solutions of known concentration. Copyright (c) 2005 John Wiley & Sons, Ltd.