High lateral resolution aspects of Raman spectroscopy, specifically of tip-enhanced Raman scattering (TERS) are currently of large interest, as sub molecular resolution has been demonstrated experimentally by several groups. This could open the way to many interesting applications, particularly correlation nanoscale material properties with the actual local structure. <br/>Presently, most experiments are done under cryogenic conditions, that allow extremely stable and reproducible conditions. At this time this is an important prerequisite to compare with current  theoretical models. Ultimately, however, it is important to move forward towards more “chemically relevant” conditions, where reactions can and will occur. For such applications the temperature range eventually will have to be increased. As a consequence not only dynamic changes due to reactivity can be observed, but also thermal effects regarding the molecules position need to be considered.<br/>We will present room temperature experiments that will not only demonstrate the high-resolution capabilities of near-field Raman spectroscopy, but also methods that allow to overcome critical aspects like thermal sample diffusion or simple stage drift. Furthermore, we will present experimental investigations accompanied with the respective theoretical models regarding the inevitable localised heat deposition that occurs when using plasmonic enhancement.

Aspects of high resolution TERS under ambient conditions

2019 Fall National Meeting

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