Ultrafast interfacial proton-coupled electron transfer

Bin Li, Jin Zhao, Ken Onda, Kennath D. Jordan, Jinlong Yang, Hrvoje Petek

Research output: Contribution to journalArticlepeer-review

183 Citations (Scopus)

Abstract

The coupling of electron and nuclear motions in ultrafast charge transfer at molecule-semiconductor interfaces is central to many phenomena, including catalysis, photocatalysis, and molecular electronics. By using femtosecond laser excitation, we transferred electrons from a rutile titanium dioxide (110) surface into a CH3OH overlayer state that is 2.3 ± 0.2 electron volts above the Fermi level. The redistributed charge was stabilized within 30 femtoseconds by the inertial motion of substrate ions (polaron formation) and, more slowly, by adsorbate molecules (solvation). According to a pronounced deuterium isotope effect (CH3OD), this motion of heavy atoms transforms the reverse charge transfer from a purely electronic process (nonadiabatic) to a correlated response of electrons and protons.

Original languageEnglish
Pages (from-to)1436-1440
Number of pages5
JournalScience
Volume311
Issue number5766
DOIs
Publication statusPublished - Mar 10 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General

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