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Charging dynamics of an individual nanopore

Author

Listed:
  • Ran Tivony

    (Weizmann Institute of Science)

  • Sam Safran

    (Weizmann Institute of Science)

  • Philip Pincus

    (University of California)

  • Gilad Silbert

    (Weizmann Institute of Science
    Adama Makhteshim Ltd)

  • Jacob Klein

    (Weizmann Institute of Science)

Abstract

Meso-porous electrodes (pore width « 1 µm) are a central component in electrochemical energy storage devices and related technologies, based on the capacitive nature of electric double-layers at their surfaces. This requires that such charging, limited by ion transport within the pores, is attained over the device operation time. Here we measure directly electric double layer charging within individual nano-slits, formed between gold and mica surfaces in a surface force balance, by monitoring transient surface forces in response to an applied electric potential. We find that the nano-slit charging time is of order 1 s (far slower than the time of order 3 × 10−2 s characteristic of charging an unconfined surface in our configuration), increasing at smaller slit thickness, and decreasing with solution ion concentration. The results enable us to examine critically the nanopore charging dynamics, and indicate how to probe such charging in different conditions and aqueous environments.

Suggested Citation

  • Ran Tivony & Sam Safran & Philip Pincus & Gilad Silbert & Jacob Klein, 2018. "Charging dynamics of an individual nanopore," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06364-1
    DOI: 10.1038/s41467-018-06364-1
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    Cited by:

    1. Lauren S. Lastra & Y. M. Nuwan D. Y. Bandara & Michelle Nguyen & Nasim Farajpour & Kevin J. Freedman, 2022. "On the origins of conductive pulse sensing inside a nanopore," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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