Figure 2
From: Infrared-spectroscopic, dynamic near-field microscopy of living cells and nanoparticles in water
s-SNOM-observed membrane wetting, (A) infrared amplitude s2 and (B) topography z nanoimages of a free-standing 20-nm thick SiN membrane on its Si frame (scale bars 2 µm), as-received exhibits a partial wetting in the lower left corner of the 20 × 20 µm2 hole (Norcada NX5002Y), (C) after UV hydrophilisation and complete wetting, line profiles are extracted from images (not shown) of infrared amplitude s2 (red), topography z (black), and mechanical phase φmech (blue) across an edge (at x = 0) of the frame into the membrane.
