Humboldt-Universität zu Berlin - SALSA School of Analytical Sciences Adlershof

Raman microspectroscopic imaging

Challenging application-related research questions regarding materials systems ranging from historical mortar binders to modern solar-cell absorbers are ideal to train the used analytical technique and develop novel analytical methods. The advancement of Raman microspectroscopy beyond the chemical imaging of distributions of inorganic phases or organic compounds is a main aim of our research, which has demonstrated that

  • the evaluation of intensities of Raman marker bands provides distributions of chemical compounds and their polymorphs,
  • small shifts (typically < 1 cm-1) of Raman bands provide stress and strain distributions,
  • larger band shifts provide quantitative access to foreign ions in crystal lattices as well as solid solution series,
  • maps of relative Raman intensities elucidate crystal orientations, and
  • Raman band width maps reveal different crystallinities.

These features are extracted from Raman-spectroscopic mapping data by own software, whose further development is triggered by application-related research questions.




Raman microscopic imaging of a clinker remnant in a 19th-century cement mortar showing different chemical and physical properties derived from the mapping data
(table-of-contents image of Heritage 2 (2019) 1662-1683).


Recommended read:

T. Schmid, P. Dariz, Heritage 2 (2019) 1662-1683.


Citations on Wikipedia:

Raman spectroscopy: Instrumentation

Raman spectroscopy: Microspectroscopy

Raman scattering: Instrumentation

Raman spectroelectrochemistry

Espectroelectroquímica Raman

রমন প্রভাব (Raman effect, bengal)