Chemical site capacitance: Submolecular measurements and a model

Roie Yerushalmi*, Milko E. Van Der Boom, Hagai Cohen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The study of molecular electric properties is an intriguing, rapidly developing field in which technological and basic scientific challenges and developments are evolving. Nevertheless, understanding of the interplay of intermolecular interactions, substrate effects, and electrode contacts remains challenging. Here, we present noncontact chemically resolved electrical measurements (CREM) of halide-terminated molecular layers and a straightforward model for quantitative analysis of submolecular chemical site capacitance. We demonstrate that under low current densities, the main electronic effects can be accounted for by considering the (sub)molecular properties of the monolayers, whereas the excess potential due to charge injection can be described as site capacitance corresponding to chemically identifiable molecular sites.

Original languageAmerican English
Pages (from-to)13652-13654
Number of pages3
JournalJournal of Physical Chemistry C
Issue number37
StatePublished - 20 Sep 2007
Externally publishedYes


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