Substrate-mediated photodesorption from multilayers of CH3I on TiO2(110) at 90 K

Seong Han Kim, Peter C. Stair, Eric Weitz

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The substrate-mediated photodesorption of CH3I on TiO2(110) for low fluence irradiation at 257 and 320 nm has been investigated using time-of-flight quadrupole mass spectrometry. The photodesorption of CH3I in contact with TiO2(110) results from resonant electron transfer from photoexcited TiO2(110) to CH3I, followed by an Antoniewicz-type desorption process. Overlayers of 2~4 monolayer (ML) suppress this resonant desorption process due to collisional interactions. For thick films (>5 ML), photoexcitation of the TiO2(110) can lead to solvation of an electron ejected from the substrate into the film, which can then induce desorption of molecules from the surface of the film.

Original languageEnglish (US)
Pages (from-to)511-516
Number of pages6
JournalChemical Physics Letters
Issue number5-6
StatePublished - Mar 26 1999

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


Dive into the research topics of 'Substrate-mediated photodesorption from multilayers of CH3I on TiO2(110) at 90 K'. Together they form a unique fingerprint.

Cite this