Formation of Germa-ketenimine on the Ge(100) Surface by Adsorption of tert-Butyl Isocyanide

Bonggeun Shong, Jong Suk Yoo, Tania E. Sandoval, Stacey F. Bent

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Reactions of the (100) surfaces of Ge and Si with organic molecules have been generally understood within the concept of "dimers" formed by the 2 × 1 surface reconstruction. In this work, the adsorption of tert-butyl isocyanide on the Ge(100)-2 × 1 surface at large exposures is investigated under ultrahigh vacuum conditions. A combination of infrared spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed desorption experiments along with dispersion-corrected density functional theory calculations is used to determine the surface products. Upon adsorption of a dense monolayer of tert-butyl isocyanide, a product whose structure resembles a germa-ketenimine (N=C=Ge) with σ donation toward and π back-donation from the Ge(100) surface appears. Formation of this structure involves divalent-type surface Ge atoms that arise from cleavage of the Ge(100)-2 × 1 surface dimers. Our results reveal an unprecedented class of reactions of organic molecules at the Ge(100) surface.

Original languageEnglish
Pages (from-to)8758-8765
Number of pages8
JournalJournal of the American Chemical Society
Issue number25
StatePublished - 28 Jun 2017


Dive into the research topics of 'Formation of Germa-ketenimine on the Ge(100) Surface by Adsorption of tert-Butyl Isocyanide'. Together they form a unique fingerprint.

Cite this