Microscopy Solutions Blog

Combining Raman Microscopy with Scanning Electron Microscopy (SEM) to Study Inorganic and Mineral Samples

With the support of Renishaw, The Geological Institute of Romania, located in Bucharest, is performing high resolution analysis on geological samples using energy dispersive spectroscopy (EDS) and Raman spectroscopy.

The Geological Institute of Romania is famous for its museum which hosts a collection of more than 80,000 samples of rocks, fossils and minerals from all over Romania. Oana-Claudia Barbu and Daniel Bîrgăoanu are both PhD students and research assistants in the electron microscopy laboratory, known as MICROCOSMOS, where they study inorganic and mineral samples. They use Renishaw’s structural and chemical analyser (SCA) interface to bring the Raman analysis capabilities of the inVia™ confocal Raman microscope to their scanning electron microscope (SEM). The inVia and SCA interface provide an in-SEM analytical technique that allows co-located chemical information and the flexibility of a fully functioning Raman microscope.

Renishaw_SCA_interface.pngMs Barbu commented, “This allows us to perform high resolution analysis on geological samples using energy dispersive spectroscopy (EDS) and Raman spectroscopy. Our Zeiss SEM is also equipped with electron back scattering (EBSD) and wavelength dispersive (WDS) detectors to give even better correlation of results. The system is easy to use and has user-friendly analysis software (WiRE 4™) that provides us with high definition chemical images from our very large Raman datasets. We greatly appreciate the strong support we have received from Renishaw.”

Here Oana-Claudia Barbu is shown using Renishaw’s SCA interface mounted with a Zeiss electron microscope at the Geological Institute of Romania in Bucharest.

Renishaw_mining.pngAn example, typical of their work, is the study of mining waste to better understand its composition. In both the Raman spectrum and EDS analysis below, the metallic mineral content is identified as pyrite (iron sulphide, FeS2).


For details about Renishaw’s co-located SEM-Raman system visit www.renishaw.com/SEMRaman 

Find out how Raman microscopy is being used in earth sciences applications >>

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