Geo Science
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Fluid inclusion in garnet. -
The WITec confocal Raman imaging systems are excellent analytical tools for the comprehensive investigation of geological samples, such as the identification and characterization of minerals, or in the observation of mineral phase transitions in high and ultra-high pressure/temperature experiments.
With confocal Raman imaging the spatial distribution and association of components or mineral phases, or chemical variation can be observed and this information may contribute significantly to the understanding of a sample’s complexity. Such characteristics can be evaluated with the WITec imaging systems from large scale scans in the centimeter range to the finest detail with sub-micron resolution. Considering that most geo-materials are transparent from the NUV to VIS and NIR to some degree, this information can be furthermore obtained three-dimensionally due to the confocal set-up of the WITec confocal Raman microscopes.
WITec’s highly versatile instruments can combine various imaging techniques to significantly increase the insights provided by measurement results. Possible combinations which can be included in a single microscope setup include confocal Raman imaging, Atomic Force Microscopy (AFM), Nearfield-Microscopy (SNOM) and Scanning Electron Microscopy (SEM). Confocal Raman imaging provides chemical information, AFM detects topography, structure, and physical properties such as stiffness, adhesion, etc. of the sample’s surface, and SNOM high-resolution measurements can optically reach beyond the diffraction limit. All WITec instrument configurations can be upgraded at any point to adapt the system to new or extended requirements.
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Application Examples
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Large-area Raman image of a polished rock section with corresponding spectra. -
AFM image (pulsed force mode) of fossilized bacteria. The image shows the different adhesion levels of the sample surface.
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RISE Microscopy (Raman-SEM) of a diorite sample. -
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Topographic confocal Raman image of a inclined rock sample.
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Imaging Systems for Geo Science
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alpha300 A for Atomic Force Microscopy
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alpha300 R for confocal Raman imaging
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alpha300 RA for combined Raman-AFM imaging
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RISE Microscopy for correlative Raman-SEM imaging
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