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Letter

Fabrication and Characterization of Nanopore-Based Electrodes with Radii down to 2 nm

Diego Krapf, Meng-Yue Wu, Ralph M. M. Smeets, Henny W. Zandbergen, Cees Dekker, and Serge G. Lemay*

Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands

Nano Lett., 2006, 6 (1), pp 105–109

DOI: 10.1021/nl052163x

Publication Date (Web): December 8, 2005

Abstract

We report on the fabrication and characterization of gold nanoelectrodes with carefully controlled nanometer dimensions in a matrix of insulating silicon nitride. A focused electron beam was employed to drill nanopores in a thin silicon nitride membrane. The size and shape of the nanopores were studied with high-resolution transmission electron microscopy and electron-energy-loss two-dimensional maps. The pores were subsequently filled with gold, yielding conically shaped nanoelectrodes. The nanoelectrodes were examined by atomic and electrostatic force microscopy. Their applicability in electrochemistry was demonstrated by steady-state cyclic voltammetry. Pores with a radii down to 0.4 nm and electrodes with radii down to 2 nm are demonstrated.

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History

Published In Issue January 11, 2006
Received November 2, 2005
Revised Manuscript Received November 21, 2005

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Letter

Fabrication and Characterization of Nanopore-Based Electrodes with Radii down to 2 nm

Abstract

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History

Recommend & Share

Related Content

Detection of Local Protein Structures along DNA Using Solid-State Nanopores

Electrophoretic Force on a Protein-Coated DNA Molecule in a Solid-State Nanopore

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