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Area of Science:

  • Physical Chemistry
  • Materials Science
  • Computational Chemistry

Background:

  • Interfacial regions, though small, significantly influence system processes.
  • Understanding interfaces is key to many physical chemistry questions.
  • Traditional phase descriptions rely on bulk properties, necessitating new methods for interfaces.

Purpose of the Study:

  • To develop a novel method for identifying and defining interfacial regions.
  • To provide a computational tool for analyzing the unique properties of interfaces.
  • To investigate the correlation between interfacial dynamics and local molecular composition.

Main Methods:

  • Introduced a "directed search cone" method to identify atoms at interfaces.
  • Defined interfacial atoms as "leading atoms" based on local density and structure deviations.
  • Constructed a "leading layer interface" from these identified atoms.

Main Results:

  • Successfully demonstrated the "leading layer interface" on solid-vacuum, liquid-vacuum, and liquid-vapor systems.
  • Observed local density fluctuations within interfacial regions.
  • Validated the method's utility in analyzing heterogeneous systems.

Conclusions:

  • The "leading layer interface" method offers a new perspective for studying interfacial phenomena.
  • This method is particularly useful for correlating interfacial dynamics with local molecular composition.
  • The approach provides valuable insights into the behavior of matter at boundaries.