title: The nanopore electrode.
abstract: The fabrication and electrochemical characterization of truncated cone-shaped nanopore electrodes are reported. A nanopore electrode is a Pt disk electrode embedded at the bottom of a conical pore, the circular orifice of the pore having nanometer dimensions. The electrochemical properties of nanopore electrodes with orifice radii of 39 and 74 nm are presented. Both the steady-state and transient voltammetric behavior of the nanopore electrode are reported and compared to predictions obtained using finite-element simulations. The truncated cone-shaped pore electrode possesses a unique transport property-the steady-state flux of molecules into a deep pore is limited by the restriction near the pore orifice, and thus, the steady-state current is independent of the pore depth. This characteristic is potentially useful in studying transport through nanometer-scale orifices.
authors.affiliation: Departments of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Yanhui
authors.initials: Y
authors.lastname: Zhang
authors.forename: Henry S
authors.initials: HS
authors.lastname: White