title: Fast nonlinear ion transport via field-induced hydrodynamic slip in sub-20-nm hydrophilic nanofluidic transistors.
abstract: Electrolyte transport through an array of 20 nm wide, 20 microm 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.
authors.affiliation: The Kavli Nanoscience Institute and Division of Engineering and Applied Science, Bioengineering, Caltech, Pasadena, California 91125, USA.
authors.forename: Udi
authors.initials: U
authors.lastname: Vermesh
authors.forename: Jang Wook
authors.initials: JW
authors.lastname: Choi
authors.forename: Ophir
authors.initials: O
authors.lastname: Vermesh
authors.forename: Rong
authors.initials: R
authors.lastname: Fan
authors.forename: John
authors.initials: J
authors.lastname: Nagarah
authors.forename: James R
authors.initials: JR
authors.lastname: Heath