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Raman spectroscopy of optically levitated supercooled water droplet
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Schematic of the experimental apparatus. (b) Image of a single water droplet in the dual beam optical trap and its Mie scattering fringes.

Image of FIG. 2.
FIG. 2.

Raman spectra of the OH stretching band of water at different temperatures.

Image of FIG. 3.
FIG. 3.

Decomposition of the Raman spectrum, observed at T = 23.3 °C and −27.7 °C, into Gaussian components. Sum of the Gaussian components is represented by a red solid line.

Image of FIG. 4.
FIG. 4.

Temperature dependence of the integrated intensity of each Gaussian component. I 1, I 2, I 3, I 4, and I 5 represent intensities of the 3050 cm−1, 3200 cm−1, 3400 cm−1, 3500 cm−1, and 3650 cm−1 components, respectively. Solid lines are just a guide to the eye.

Image of FIG. 5.
FIG. 5.

van't Hoff plot derived from the integrated Raman intensities.

Image of FIG. 6.
FIG. 6.

Temperature dependence of the isobaric heat capacity of liquid water calculated from the experimentally determined parameters according to Eq. (3). Data from emulsion measurements2 are shown as crosses.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Raman spectroscopy of optically levitated supercooled water droplet