Raman spectroscopy is an optical technique that probes the vibrational properties of a material via the scatter-ing of (laser) light. If a vibration (phonon) is excited in the material under investigation, the scattered light loses energy and exhibits a characteristic red-shift (Stokes scattering).
The Confocal Raman setup (WITec Alpha 300 R) in our lab is equipped with multiple lasers for excitation at different wavelengths (488nm, 532nm, 785nm). The direction of incoming polarization can be continuously varied and the analysed light polarization can be selected as well. The setup is equipped with a scanning stage. In addition, Oxford Microstat system is available for cryogenic temperature measurements in the temperature range of 2 K-300 K.
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References
- Braun, O., et al. Spatially mapping thermal transport in graphene by an opto-thermal method. npj 2D Mater. Appl. 6, 6 (2022).
- Zhang, J., et al. High-speed identification of suspended carbon nanotubes using Raman spectroscopy and deep learning. Microsystems and Nanoengineering (2022).
- T. Kochetkova et al., "Combining polarized Raman spectroscopy and micropillar compression to study microscale structure-property relationships in mineralized tissues." Acta Biomaterialia 119, 390-404 (2021).
- M. Hedayati et al., "BaTiO3 nanotubes by co-axial electrospinning: Rheological and microstructural in-vestigations." Journal of the European Ceramic Society 40, 1269-1279 (2020).
- J. Overbeck et al., "A universal length-dependent vibrational mode in graphene nanoribbons." ACS Nano 13, 13083-13091 (2019).
- J. Overbeck et al., "Optimized substrates and measurement approaches for Raman spectroscopy of graphene nanoribbons." Physica Status Solidi (b) 256, 1900343 (2019).
Dr. Mirjana Dimitrievska
Group leader of the Nanomaterials Spectroscopy and Imaging Group
