Implementation of Tip Enhanced Raman Spectroscopy in liquid is still a challenge. We demonstrate herein its feasibility in an upright illumination/collection configuration. Through a thin layer of organic solvent covering the sample, laser focussing on the tip is possible, enabling TERS imaging in liquid.
T. Touzalin, A. L. Dauphin, S. Joiret, I. T. Lucas and E. Maisonhaute, Phys. Chem. Chem. Phys., 2016, 18, 15510 DOI: 10.1039/C6CP02596J
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