Fig. 8 | Nature Communications

Fig. 8

From: Generation and characterization of ultrathin free-flowing liquid sheets

Fig. 8

Infrared spectromicroscopy of liquid water sheets. a A false-color image of the integrated IR transmission (3100–3650 cm−1) through a water sheet with 250 µL min−1 flow rate, under similar conditions as Fig. 4. The scale bar is 50 µm. b The infrared spectra of the water sheet at three points along the sheet, as indicated by the black, green, and red colored circles in a. The black and green spectra are offset for clarity. c The calculated sheet thickness along the central region of the water sheet, as indicated by the markers in a, using values of the O–H stretch mode at 3404 cm−1 (blue circles) and the H2O bending mode at 1643.5 cm−1 (gold triangles). The black, green, and red arrows indicate the positions of the respective colored markers in a, as well as the colored spectra in b. The error bars in c represent an estimate of the uncertainty of the absorption measurement based on the signal-to-noise ratio of the peaks of interest. In this case, the error bars are calculated by measuring the baseline noise (peak-to-peak) on either side of the peak of interest and scaling the error for the calculated thickness by standard error propagation methods