Experimental observation of nonlinear ionic transport at the nanometer scale

Diego Krapf, Bernadette M. Quinn, Meng Yue Wu, Henny W. Zandbergen, Cees Dekker, Serge G. Lemay*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

63 Citations (Scopus)


Nanometer-sized electrodes are used to probe the transport of ions in liquid by monitoring heterogeneous electrochemical reactions. We observe pronounced nonlinearities of ion flux versus concentration when transport is localized within a region smaller than 10 nm. We show that these observations cannot be explained using conventional continuum, mean-field descriptions of ionic transport. The data indicate that these deviations are caused by the high flux of charged species that is achieved at nanometer-sized electrodes.

Original languageEnglish
Pages (from-to)2531-2535
Number of pages5
JournalNano letters
Issue number11
Publication statusPublished - Nov 2006
Externally publishedYes


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