Direct Observation of Charge Inversion in Divalent Nanofluidic Devices

Sylvia Xin Li, Weihua Guan, Benjamin Weiner, Mark A. Reed

    Research output: Contribution to journalArticlepeer-review

    54 Scopus citations


    Solid-state nanofluidic devices have proven to be ideal systems for studying the physics of ionic transport at the nanometer length scale. When the geometrical confining size of fluids approaches the ionic Debye screening length, new transport phenomena occur, such as surface mediated transport and permselectivity. Prior work has explored these effects extensively in monovalent systems (e.g., predominantly KCl and NaCl). In this report, we present a new characterization method for the study of divalent ionic transport and have unambiguously observed divalent charge inversion at solid/fluid interfaces. This observation has important implications in applications ranging from biology to energy conversion.

    Original languageEnglish (US)
    Pages (from-to)5046-5051
    Number of pages6
    JournalNano letters
    Issue number8
    StatePublished - Aug 12 2015

    All Science Journal Classification (ASJC) codes

    • Bioengineering
    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering


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