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Area of Science:

  • Physical Chemistry
  • Materials Science

Background:

  • Supercooled water properties are key to understanding liquid water and amorphous ices.
  • Experimental studies of deeply supercooled water are challenging due to rapid crystallization.

Purpose of the Study:

  • Investigate structural relaxation kinetics (aging) in supercooled water.
  • Interpret experimental results in challenging phase space regions.

Main Methods:

  • Infrared spectroscopy
  • Transient heating of nanoscale water films
  • Temperature jump protocol analogous to Kovacs' experiments

Main Results:

  • Observed memory effects in supercooled water's structural relaxation.
  • Water structure showed an extremum upon temperature change before reaching steady-state.
  • A random double well model explained the observations.

Conclusions:

  • Dynamic heterogeneity in supercooled water influences structural relaxation.
  • The study provides insights into the behavior of supercooled water.
  • Findings aid in developing theories for liquid water and amorphous ices.