Molecular electronic tuning of Si surfaces

Rami Cohen, Noemi Zenou, David Cahen, Shlomo Yitzchaik

Research output: Contribution to journalArticlepeer-review

86 Scopus citations


Assembling quinolinium-based chromophores on silicon surfaces provides a new route to electronic control over such semiconducting surfaces. The two-step process by which the molecules are grafted on to the surface involves first coupling the organic functionality to silicon, followed by chromophore anchoring. These synthetic steps are monitored by XPS, UV - Vis and FTIR spectroscopies. Using contact potential difference measurements we found that the electron affinity of the modified silicon is a function of the molecule's dipole moment. The same technique shows a pronounced effect of the sub-nanometer siloxane-based, coupling-agent, layer by itself on the band bending and band-bending modification as function of chromophore adsorption.

Original languageEnglish
Pages (from-to)270-274
Number of pages5
JournalChemical Physics Letters
Issue number5-6
StatePublished - 21 Nov 1997
Externally publishedYes


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