Theoretical and Practical Considerations of Spatially Offset Raman Spectroscopy (SORS) and Micro-SORS.

IF 2.2 3区 化学 Q2 INSTRUMENTS & INSTRUMENTATION Applied Spectroscopy Pub Date : 2024-08-14 DOI:10.1177/00037028241270263
Alberto Lux, Claudia Conti, Alessandra Botteon, Sara Mosca, Pavel Matousek
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Abstract

Spatially offset Raman spectroscopy (SORS) is typically used to non-invasively investigate stratified samples that possess features on a millimeter scale, whereas micro-SORS usually deals with micrometer-thick layered samples. However, there are many instances where these boundaries are intertwined, sometimes indicating the possibility of using both techniques as well as circumstances that present mutual exclusion to their applicability. The aim of this study is to establish an application protocol that provides better insight into their suitability for deployment in various scenarios. The differences and similarities between the two approaches are investigated highlighting their strengths and limitations considering both theoretical and practical aspects. Diverse available parameters entail prospects and restrictions of both techniques and give rise to specific instrumental effects, namely, the overlap between the collection and excitation areas, the percentage of collected area for a given spatial offset, and the accuracy in the definition of the spatial offset (spread effect). These aspects are studied and exemplified on mockup samples relevant to the field of cultural heritage. The samples are characterized by high compositional complexity comprising features ranging from micrometer to millimeter scales. The conclusions reached are also relevant to other scientific areas such as biomedical, forensic, or energy harvest.

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表达:空间偏移拉曼光谱(SORS)和微 SORS 的理论和实践考虑。
空间偏移拉曼光谱(SORS)通常用于对具有毫米级特征的分层样品进行非侵入式研究,而微 SORS 通常处理微米厚的层状样品。然而,在许多情况下,这些界限是相互交织的,有时表明可以同时使用这两种技术,有时则表明在某些情况下这两种技术的适用性是相互排斥的。本研究的目的是建立一个应用协议,以便更好地了解这两种技术在各种情况下的适用性。通过对两种方法的异同进行研究,突出了它们在理论和实践方面的优势和局限性。多种可用参数决定了这两种技术的前景和限制,并产生了特定的工具效应,即采集区域和激励区域之间的重叠、给定空间偏移的采集区域百分比以及空间偏移定义的准确性(扩散效应)。我们在与文化遗产领域相关的模拟样本上对这些方面进行了研究和示范。这些样本的特点是成分高度复杂,包含从微米到毫米级的各种特征。得出的结论也适用于其他科学领域,如生物医学、法医或能源采集。
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来源期刊
Applied Spectroscopy
Applied Spectroscopy 工程技术-光谱学
CiteScore
6.60
自引率
5.70%
发文量
139
审稿时长
3.5 months
期刊介绍: Applied Spectroscopy is one of the world''s leading spectroscopy journals, publishing high-quality peer-reviewed articles, both fundamental and applied, covering all aspects of spectroscopy. Established in 1951, the journal is owned by the Society for Applied Spectroscopy and is published monthly. The journal is dedicated to fulfilling the mission of the Society to “…advance and disseminate knowledge and information concerning the art and science of spectroscopy and other allied sciences.”
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