1. Phonon abundance-stiffness-lifetime transition from the mode of heavy water to its confinement and hydration
- Author
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Yongli Huang, Yuan Peng, Chang Q. Sun, Yi Sun, Yezi Yang, School of Electrical and Electronic Engineering, and Centre for Micro-/Nano-electronics (NOVITAS)
- Subjects
Materials science ,Solvation Bonding Dynamics ,Molecular Nonbond Interactions ,Phonon ,Ionic bonding ,02 engineering and technology ,010402 general chemistry ,Thermal diffusivity ,01 natural sciences ,Molecular dynamics ,Viscosity ,Physics::Atomic and Molecular Clusters ,Materials Chemistry ,Physical and Theoretical Chemistry ,Spectroscopy ,Quantitative Biology::Biomolecules ,Hydrogen bond ,Surface stress ,Solvation ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Chemical physics ,Electrical and electronic engineering [Engineering] ,0210 nano-technology - Abstract
A combination of the spatially- and temporally-resolved phonon spectroscopies has enabled calibration of hydrogen bond transition from the vibration mode of heavy water to the core-shell structured nanodroplets and to the ionic hydration shells of salt solutions in terms of phonon abundance-lifetime-stiffness. It is uncovered that charge injection by salt solvation and skin formation by molecular undercoordination (often called confinement) share the same supersolidity characterized by H–O (D–O as a probe) bond contraction, O:H nonbond elongation, and polarization. Such a process of bond transition stems the solution viscosity, surface stress, and slowing down of the molecular dynamics and diffusivity. The nanodroplet skin reflection further hinders phonon energy dissipation associated with longer D–O phonon lifetime. Financial support received from National Natural Science Foundation of China (Nos. 11872052(YL); 21875024(CQ)), the Science Challenge Project (No. TZ2016001) of China is acknowledged.
- Published
- 2019