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Published April 2009 | Supplemental Material
Journal Article Open

Fast nonlinear ion transport via field-induced hydrodynamic slip in sub-20-nm hydrophilic nanofluidic transistors


Electrolyte transport through an array of 20 nm wide, 20 μm long SiO_2 nanofluidic transistors is described. At sufficiently low ionic strength, the Debye screening length exceeds the channel width, and ion transport is limited by the negatively charged channel surfaces. At source−drain biases >5 V, the current exhibits a sharp, nonlinear increase, with a 20−50-fold conductance enhancement. This behavior is attributed to a breakdown of the zero-slip condition. Implications for energy conversion devices are discussed.

Additional Information

© 2009 American Chemical Society. Received September 25, 2008; Revised Manuscript Received January 9, 2009. Publication Date (Web): March 5, 2009. This work was funded by the Department of Energy (DE-FG02-04ER46175) and by a subcontract from the MITRE Corporation. U.V. acknowledges a Betty and Gordon Moore fellowship. J.W.C. acknowledges the Samsung Scholarship.

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Supplemental Material - Vermesh2009p1665Nano_Lett_supp.pdf


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