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Hydration dynamics in CaCO3 nucleation by THz spectroscopy

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2017

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Sebastiani, Federico
Born, Benjamin
Luong, Trung Quan
Havenith, Martina

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https://doi.org/10.1109/IRMMW-THz.2017.8066992
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2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves : Cancun, Quintana Roo, Mexico, August 27-September 1, 2017. Piscataway, NJ: IEEE, 2017. eISSN 2162-2035. ISBN 978-1-5090-6050-4. Available under: doi: 10.1109/IRMMW-THz.2017.8066992

Zusammenfassung

In CaCO3 nucleation, the role of water remains enigmatic. Changes in THz absorption during the early stages of CaCO3 nucleation evidence altered coupled motions of hydrated calcium and carbonate ions. By high precision THz absorption measurements we were able to follow the changes in the hydration bond dynamics during nucleation. Our THz data strongly suggest that amorphous CaCO3 forms through solidification of initially liquid precursors. Polycarboxylates, which stabilize CaCO3 liquid precursors, significantly enhance the kinetic stability of the metastable liquid-liquid state. The importance of water network dynamics in phase separation mechanisms as tested by THz absorption measurements using a p-Ge spectrometer is likely to be more general for aqueous systems.

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540 Chemie

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2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 27. Aug. 2017 - 1. Sept. 2017, Cancún, Mexico
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ISO 690SEBASTIANI, Federico, Stefan L. P. WOLF, Benjamin BORN, Trung Quan LUONG, Helmut CÖLFEN, Denis GEBAUER, Martina HAVENITH, 2017. Hydration dynamics in CaCO3 nucleation by THz spectroscopy. 2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Cancún, Mexico, 27. Aug. 2017 - 1. Sept. 2017. In: 2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves : Cancun, Quintana Roo, Mexico, August 27-September 1, 2017. Piscataway, NJ: IEEE, 2017. eISSN 2162-2035. ISBN 978-1-5090-6050-4. Available under: doi: 10.1109/IRMMW-THz.2017.8066992
BibTex
@inproceedings{Sebastiani2017-08Hydra-41507,
  year={2017},
  doi={10.1109/IRMMW-THz.2017.8066992},
  title={Hydration dynamics in CaCO3 nucleation by THz spectroscopy},
  isbn={978-1-5090-6050-4},
  publisher={IEEE},
  address={Piscataway, NJ},
  booktitle={2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves : Cancun, Quintana Roo, Mexico, August 27-September 1, 2017},
  author={Sebastiani, Federico and Wolf, Stefan L. P. and Born, Benjamin and Luong, Trung Quan and Cölfen, Helmut and Gebauer, Denis and Havenith, Martina}
}
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