Abstract
A Laser adaptive microweighting system for measurement of molecules mass based on the principles of adaptive holog aphic interferometry is proposed and experimentally tested in task of gas concentration measurement. A sensitive element of the system is a microcantilever coated by a layer of chitosan, which can adsorb different molecules. Changes in gas concentration re ult in change in mass of molecules adsorbed in chitosan, and, as sequence, result in change in natural frequency of cantilever oscillations, which are measured by an adaptive holographic interferometer. The operation of the system has been experimentally demonstrated in measurement of water vapor concentration. The detected change in concentration of H2O molecules amounted to 125ppm.
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