Development of a full micro-scale spatially offset Raman spectroscopy prototype as a portable analytical tool

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Materials Science

Background:

• Conventional Raman microscopy is limited to surface analysis.
• In situ analysis of stratified layers is challenging for non-invasive techniques.
• Cultural heritage, forensics, and materials science require non-destructive depth profiling.

Purpose of the Study:

• To present a portable prototype for micro-Spatially Offset Raman Spectroscopy (micro-SORS).
• To enable in situ subsurface analysis of thin, highly turbid stratified layers.
• To demonstrate the application of the device in characterizing polymer and paint layers.

Main Methods:

• Development of a portable full micro-Spatially Offset Raman Spectroscopy (micro-SORS) system.
• Characterization of the prototype using polymer and paint layer systems.
• In situ analysis of stratified layers at depths beyond conventional Raman microscopy.

Main Results:

• The portable micro-SORS prototype successfully performed in situ subsurface analysis.
• The device demonstrated capability in analyzing thin, turbid stratified layers.
• Non-invasive characterization of painted layers and stratified polymers was achieved.

Conclusions:

• The portable micro-SORS device offers unprecedented in situ subsurface analysis capabilities.
• This technology unlocks the non-invasive and non-destructive potential of micro-SORS for large objects.
• Applications span cultural heritage, forensics, and materials science, avoiding destructive sampling.