Characterization of bound and free water in gelatin hydrogels and their contribution to THz frequency permittivity

A. Tamminen, M. Baggio, R. Grigorev, I. Nefedova, S. V. Palli, J. Ala-Laurinaho, E. R. Brown, V. P. Wallace, Emma MacPherson, T. Maloney, Z. D. Taylor

Research output: Contribution to conferenceAbstractpeer-review

Abstract

We present reflective THz spectroscopic measurements of gelatin hydrogels with different gelatin bases combined with differential scanning calorimetry to quantify the bound water mass fraction of each sample. Samples were synthesized as either planar, optically thick slabs, or thin films lying atop optically thick water volumes. The analysis shows that the THz permittivity of water bound to gelatin molecules and the total bound water mass fraction vary significantly depending on the gelatin base used, the total water mass, and environmental conditions. These results support thorough characterization bound water in gelatin hydrogel phantoms prior to their us as a calibration target.
Original languageEnglish
DOIs
Publication statusPublished - 2022
Event47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022 - Delft, Netherlands
Duration: 28 Aug 20222 Sept 2022

Conference

Conference47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022
Country/TerritoryNetherlands
CityDelft
Period28/08/222/09/22

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