Service: Micro & Macro Raman Spectroscopy (785 & 532 nm)
Platforms
Molab
Techniques
Micro-raman spectroscopy
Organization
Service contact persons
Raman spectroscopy is a molecular vibrational spectroscopic technique which provides information on materials composition.
Raman spectroscopy is a molecular vibrational spectroscopic technique which provides complementary information to FT-IR. Differently from FT-IR, Raman is based on a anelastic scattering process probing the vibrational properties of the materials. Being a molecular spectroscopic technique, it provides information concerning the functional groups constituting the molecules ultimately aiding a molecular identification of unlimited materials under exam. In the practice, mainly inorganic (but also organic) materials can be identified with particular attention to metal-oxides pigments that are not detectable by FT-IR. The instrumentation provides the use of long wavelength lasers (i.e 785 and 1064 nm) to overcome the main limitation of the technique, namely the high fluorescence emissions which may compete with the scattering phenomena and cover any useful vibrational signals. Its 532 nm laser system in a micro-Raman set-up is particularly adapt to low fluorescing inorganic based substrates, such as ceramics, bronzes, minerals, gems and stone materials.
Direct artificial illumination may interfere with the acquisition
Fields of application
Archaeometry
Chemistry
Gemology
Geology
Heritage science (cultural heritage discipline)
Materials science
Mineralogy
Science-related disciplines
Materials
Synthetic inorganic pigment
Inorganic material
Synthetic dye
Mineral
Polymers
Glass Materials
Ceramic (material)
Gemstone
Synthetic organic pigment
Natural inorganic pigment
Natural organic pigment
Synthetic inorganic pigment
Synthetic organic pigment
Glass Materials
Mineral
Ceramic (material)
Corrosion (residue material)
Salt (inorganic material)
Methods
Other information
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Input: Imaging/photographic (Vis, UV, NIR) documentation available from the users (jpg, tiff)
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Output: Original Ascii files; complete MOVIDA file with measuring points, metadata (experimental conditions, comments relative to the point), data processing and interpretation; image of the sampling area