Close to the diffraction limit in high resolution ATR FTIR mapping: demonstration on micrometric multi-layered art systems,Analyst

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Close to the diffraction limit in high resolution ATR FTIR mapping: demonstration on micrometric multi-layered art systems
Analyst ( IF 3.6 ) Pub Date : 2017-11-23 00:00:00 , DOI: 10.1039/c7an00873b
Moira Bertasa _{1,

2,

3,

4,

5} , Elena Possenti _{1,

2,

3,

4,

6} , Alessandra Botteon _{1,

2,

3,

4} , Claudia Conti _{1,

2,

3,

4} , Antonio Sansonetti _{1,

2,

3,

4} , Raffaella Fontana _{4,

7,

8} , Jana Striova _{4,

7,

8} , Diego Sali _{3,

4,

9}

Affiliation

This paper is aimed at demonstrating the potentiality of high resolution Attenuated Total Reflection Fourier Transform Infrared micro-mapping (micro-ATR-FTIR) to reconstruct the images of micrometric multi-layered systems. This method can be an effective analytical alternative when the layer thickness requires high lateral resolution, and fluorescence or thermal effects prevent the deployment of conventional analytical techniques such as micro-Raman spectroscopy. This study demonstrates the high micro-ATR-FTIR setup performances in terms of lateral resolution, spectral quality and chemical image contrast using a new laboratory instrument equipped with a single element detector. The method has been first validated on mock-ups and then successfully applied on cross-sectional samples from real artworks: Leonardo da Vinci's mural painting, characterised by a few micrometers thin sequence of organic and inorganic layers, and an outdoor marble statue, with a complex sequence of decay products on its surface. This study paves the way to a new investigation modality of micrometric systems, combining high lateral resolution with excellent spectral quality, essential in the field of Cultural Heritage as well as in the wider area of materials and forensic sciences.

中文翻译：

接近高分辨率ATR FTIR映射中的衍射极限：在微米多层艺术系统上的演示

本文旨在演示高分辨率衰减全反射傅立叶变换红外微映射（micro-ATR-FTIR）重建微米级多层系统图像的潜力。当层厚度需要较高的横向分辨率，并且荧光或热效应阻止了常规分析技术（如微拉曼光谱法）的部署时，该方法可能是一种有效的分析替代方法。这项研究表明，使用配备了单元素检测器的新型实验室仪器，在横向分辨率，光谱质量和化学图像对比度方面，Micro-ATR-FTIR具有很高的设置性能。该方法首先在模型上进行了验证，然后成功应用于真实艺术品的横截面样本：达芬奇（Leonardo da Vinci）的壁画，其特征是有机层和无机层的厚度为几微米，并且室外大理石雕像的表面上具有复杂的腐烂产物序列。这项研究为将微米级系统的新研究模式铺平了道路，该方法结合了高横向分辨率和出色的光谱质量，这在文化遗产领域以及材料和法医科学的广泛领域中都是必不可少的。

更新日期：2017-11-23

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