X-ray spectroscopy of liquid water microjets

Kevin R. Wilson, Bruce S. Rude, Tony Catalane, Richard D. Schaller, James G. Tobin, Dick T. Co, R. J. Saykally*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

150 Scopus citations


We present the first results from studies of liquid water microjets by soft X-ray absorption spectroscopy. Near the oxygen K-edge (∼530 eV) a fine-structure pattern very similar to that found for gaseous water monomers is observed when the surface-selective total ion yield (TIY) is measured, but a broadened and blue-shifted spectrum emerges when detecting the bulk-sensitive total electron yield (TEY). TIY EXAFS measurements produce a nearest neighbor O-O distance for surface molecules (3.00 Å) slightly longer than that of the isolated water dimer (2.98 Å), whereas the O-O distance extracted from TEY EXAFS corresponds to that accepted for bulk water (2.85 Å). Together, these results evidence an equilibrium liquid water surface . dominated by water molecules interacting weakly at longer distances than in the bulk, thus supporting predictions from computer simulations.

Original languageEnglish (US)
Pages (from-to)3346-3349
Number of pages4
JournalJournal of Physical Chemistry B
Issue number17
StatePublished - May 3 2001

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry


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