Yilmaz, U., Lendl, B., & Ramer, G. (2022, June 23). Novel approach for bottom-illuminated photothermal nanoscale chemical imaging with a flat silicon sample carrier [Poster Presentation]. ICPPP21 - International Conference on Photoacoustic and Photothermal Phenomena, Bled, Slovenia.
In this work we introduce a novel sample carrier for liquid AFM that is more chemically resistant, easier to handle and cheaper than the state of the art ZnSe prisms. Our approach uses micro-machined flat silicon-wafer that can be used for AFM-IR experiments. This opens up new ways for measuring AFM-IR in liquids. The flat shape allows easy handling and spin coating of samples on the carrier. Because the carrier is made of silicon, surface functionalization is well understood. Changing a system build around the use of ATR prisms, of course needs some adjustments to the instrumentation. Using rapid prototyping these new, flat Si-carriers can be made compatible with existing commercial AFM-IR instruments. For highest sensitivity, adjustments to the beam path are required to account for this new substrate’s geometry, as there is the change from a high-refractive index prism to a flat ATR holder of different material. This was achieved with an additional, removable collimating lens.
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Project title:
High-Performance Large Area Organic Perovskite devices for lighting, energy and Pervasive Communications: 8619858 (European Commission)
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Research Areas:
Special and Engineering Materials: 20% Materials Characterization: 50% Non-metallic Materials: 30%