Back to Search
Start Over
Supersolid Skin Mechanics of Water and Ice
- Source :
- Procedia IUTAM. 21:102-110
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Skins of water and ice perform anomalously in capacities of hydrophobicity, lubricity, mass density, thermal stability, viscoelasticity, and phonon frequency with yet little knowledge about the mechanism behind these anomalies. We present the recent progress in this regard from the perspective of molecular undercoordination induced O:H-O bond segmental cooperative relaxation and nonbonding electron polarization. The skin molecular undercoordination shortens the intramolecular H-O covalent bond spontaneously from 1.0 to 0.84 Ǻ, while the Coulomb repulsion between oxygen anions lengthens the intermolecular O:H nonbond from 1.70 to 2.71 Ǻ associated with strong polarization. The O:H-O resultant elongation depresses the mass density to 0.75 g/cm 3 ; the polarization results the skin high stress, hydrophobicity, lubricity, viscoelasticity; the H-O contraction shifts its stretching vibration frequency from the bulk value of 3150 to 3450 cm -1 at skin and to 3650 cm -1 of vapor; the O:H elongation shifts its stretching mode from 210 of bulk to 180 cm -1 at skin. Therefore, molecular undercoordination induced O:H-O bond relaxation and the associated polarization govern the performance of molecules at the skins of water and ice.
- Subjects :
- Materials science
Phonon
Hydrogen bond
Intermolecular force
Relaxation (NMR)
02 engineering and technology
General Medicine
021001 nanoscience & nanotechnology
01 natural sciences
Supersolid
Covalent bond
Chemical physics
Intramolecular force
0103 physical sciences
Thermal stability
010306 general physics
0210 nano-technology
Subjects
Details
- ISSN :
- 22109838
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- Procedia IUTAM
- Accession number :
- edsair.doi...........1e47bfeab6ae26a4a6b172c8c78a81b3