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Pneumatic Atomization of Liquid Water and Characterization of Submicrometer-Sized Droplets by Fourier Transform Infrared Spectroscopy

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posted on 2009-08-13, 00:00 authored by Hideto Matsuoka, Shinji Sekiguchi, Naoto Yagi, Katsuaki Inoue, Noboru Ohta, Toshinori Suzuki
Pure water was sprayed by a pneumatic atomizer into a low-pressure gas cell, and the droplets were interrogated by Fourier transform infrared (FTIR) extinction spectroscopy in the region of 700−5000 cm−1. The spectral analysis using Mie scattering theory revealed that the particles have an average diameter of 170 nm and their phases are either supercooled liquid or ice, depending on the condition of atomization. Application of pneumatic atomization to an aqueous solution of BSA was also demonstrated.