Non‐invasive and
            in situ
            investigation of layers sequence in panel paintings by portable micro‐spatially offset Raman spectroscopy

The described investigations are focused on peroxides occurring as products in atmospheric chemical processes, namely, hydrogen peroxide, methylhydroperoxide, hydroxymethylhydroperoxide, bis-(hydroxymethyl)peroxide, 1-hydroxyethylhydroperoxide, bis-(hydroxyethyl)peroxide, and hydroxymethylmethylperoxide. The compounds are identified and determined through the position and intensity of their characteristic O–O stretching bands in the range between 767 and 878 cm−1. Time-resolved Raman spectroscopy of peroxide solutions permits the in situ investigation of pathways and kinetics of reactions between peroxides and aldehydes.

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In situ investigation of thermally influenced phase transformations in (pb0.92sr0.08) (zr0.65ti0.35)o3 thin films using micro-raman spectroscopy and x-ray diffraction

IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control ◽

10.1109/tuffc.2009.1032 ◽

2009 ◽

Vol 56 (2) ◽

pp. 241-245 ◽

Cited By ~ 1

Author(s):

S. Sriram ◽

M. Bhaskaran ◽

T. Perova ◽

V. Melnikov ◽

A. Holland

Keyword(s):

Thin Films ◽

Raman Spectroscopy ◽

Phase Transformations ◽

X Ray Diffraction ◽

X Ray ◽

Micro Raman Spectroscopy ◽

In Situ Investigation

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Keynote Presentation: Raman Spectroscopy for in Situ Investigation of Electrochemical Systems

ECS Meeting Abstracts ◽

10.1149/ma2014-03/4/503 ◽

2014 ◽

Keyword(s):

Raman Spectroscopy ◽

Keynote Presentation ◽

Electrochemical Systems ◽

In Situ Investigation

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Direct In Situ Investigation of Milling Reactions Using Combined X-ray Diffraction and Raman Spectroscopy

Angewandte Chemie ◽

10.1002/ange.201409834 ◽

2014 ◽

Vol 127 (6) ◽

pp. 1819-1822 ◽

Cited By ~ 25

Author(s):

Lisa Batzdorf ◽

Franziska Fischer ◽

Manuel Wilke ◽

Klaus-Jürgen Wenzel ◽

Franziska Emmerling

Keyword(s):

Raman Spectroscopy ◽

X Ray Diffraction ◽

X Ray ◽

In Situ Investigation

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Shades of blue: non-invasive spectroscopic investigations of Maya blue pigments. From laboratory mock-ups to Mesoamerican codices

Heritage Science ◽

10.1186/s40494-019-0345-z ◽

2020 ◽

Vol 8 (1) ◽

Cited By ~ 2

Author(s):

Chiara Grazia ◽

David Buti ◽

Anna Amat ◽

Francesca Rosi ◽

Aldo Romani ◽

...

Keyword(s):

Reflection Spectroscopy ◽

Non Invasive ◽

Artistic Production ◽

Vibrational Study ◽

In Situ Investigation ◽

Maya Blue ◽

Ft Ir ◽

Compositional Variability

AbstractMaya blue is a hybrid pigment where an organic component, indigo, is incorporated in a porous clay. Despite its widespread use in the Mesoamerican artistic production and numerous studies devoted to understand the type of interactions between indigo and the host framework, its technology has not been completely unravelled yet. In this study portable non-invasive UV–vis reflection spectroscopy is proposed as a robust method for in situ investigation of Maya blue pigments. Laboratory mock-ups of powder Maya blue have been prepared employing different synthesis procedures (varying the nature of: clays, indigo–clay ratios, heating temperatures and time). The goodness of the prepared Maya blue samples—namely the occurrence of indigo–clay interactions—have been probed by micro-Raman spectroscopy and related UV–vis spectral markers have been identified. DFT calculations as well have been performed to deeply explain UV–vis profiles. The set of spectral markers have been finally exploited to interpret spectra recorded on Mesoamerican pictorial codices, through a multi-technique approach based on exploring the UV–Vis properties of the blue paint supported by the FT-IR vibrational study of the inorganic clays. The characterization of blue colours on pre-Hispanic and colonial Mesoamerican codices contribute to a better understanding of the compositional variability of these painting materials and to point out the existence of different technological traditions of colour preparation in ancient Mesoamerica.

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