Jan 7 – 12, 2018
ETH Zürich, centre
Europe/Zurich timezone

Why is Ice Less-dense and Slippery?

Jan 8, 2018, 1:20 PM
NO Building, Room C 60 (ETH Zürich, centre)

NO Building, Room C 60

ETH Zürich, centre

Sonneggstrasse 5 8092 Zürich
Talk Phases of Ice


Prof. Changqing Sun (NTU, SIngapore)


As the source and central part of all lives, water is most abundant yet least known. This presentation shares the recent progress [1-6]: (i) correlation of the length scale, structure order, and mass density of molecular packing in water ice; (ii) potential paths for O:H-O bond at relaxation; and anomalies of water ice under (iii) compression; (iv) molecular under-coordination; and (v) thermal excitation. Hydrogen bond (O:H-O) possesses memory and extreme deformation recoverability, which resolves mysteries of: (i) density of ice [7]; (ii) slipperiness of ice [8]; (iii) Mpemba paradox - hot water freezes faster [9]; (iv) Regelation [10] – ice melts under compression and freezes again when the pressure is relieved. Understanding may extend to fields such as water - bio-molecular interaction, water purification, energy management, etc. 1. Sun, C.Q. and Y. Sun, The Attribute of Water: Single Notion, Multiple Myths. Springer Ser. Chem. Phys. Vol. 113. 2016, Heidelberg: Springer-Verlag. 494 pp. 2. Huang, Y.L., et al., Hydrogen-bond relaxation dynamics: Resolving mysteries of water ice. Coordination Chemistry Reviews, 2015. 285: p. 109-165. 3. Zhang, X., et al., Water’s phase diagram: from the notion of thermodynamics to hydrogen-bond cooperativity. Progress in Solid State Chemistry, 2015. 43: p. 71-81. 4. Sun, C.Q., X. Zhang, and W.T. Zheng, Hidden force opposing ice compression. Chem Sci, 2012. 3: p. 1455-1460. 5. Sun, C.Q., et al., Density and phonon-stiffness anomalies of water and ice in the full temperature range. Journal of Physical Chemistry Letters, 2013. 4: p. 3238-3244. 6. Sun, C.Q., et al., Density, Elasticity, and Stability Anomalies of Water Molecules with Fewer than Four Neighbors. Journal of Physical Chemistry Letters, 2013. 4: p. 2565-2570. 7. Sun, Q., Raman spectroscopic study of the effects of dissolved NaCl on water structure. Vibrational Spectroscopy, 2012. 62: p. 110-114. 8. Zhang, X., et al., From ice supperlubricity to quantum friction: Electronic repulsivity and phononic elasticity. Friction, 2015. 3(4): p. 294-319. 9. Zhang, X., et al., Hydrogen-bond memory and water-skin supersolidity resolving the Mpemba paradox. Physical Chemistry Chemical Physics, 2014. 16(42): p. 22995-23002. 10. Zhang, X., et al., Ice Regelation: Hydrogen-bond extraordinary recoverability and water quasisolid-phase-boundary dispersivity. Scientific Reports, 2015. 5: p. 13655.

Significance statement

presents quantitative and consistent resolution to the properties of ice friction and ice density from the perspective of hydrogen bond relaxation and electron p[olarization.

Primary author

Prof. Xi Zhang (Shenzhen University)


Prof. Changqing Sun (NTU, SIngapore) Prof. Yongli Huang (Xiangtan University)

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