Applications

Raman imaging of a millimetre-sized core-shell SiO2@TiO2 sphere

In recent years, core-shell particles have attracted significant attention due to their smart properties. Size, morphology, and composition are the key features that strongly affect the performance and suitable applications of such structures.

Stemming from the combination of Raman spectroscopy with optical microscopy, Raman microscopy has shown beyond doubt to be a key tool to probe the chemical structure of materials. Here, we use Raman imaging to investigate the chemical composition of a millimeter-sized core-shell SiO2@TiO2 bead. It is also shown that ViewSharp™ (optical topography imaging) in combination with SmartSampling™ (which uses white light image contrast variations to optimize Raman mapping) is able to efficiently assess the uniformity of the TiO2 shell layer covering the SiO2 surface. In this case, equivalent information was acquired 50 times faster than by conventional Raman imaging.

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