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, Serge G. Lemay*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

119 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)105-109
Number of pages5
JournalNano letters
Volume6
Issue number1
DOIs
Publication statusPublished - Jan 2006
Externally publishedYes

Fingerprint

Dive into the research topics of 'Fabrication and characterization of nanopore-based electrodes with radii down to 2 nm'. Together they form a unique fingerprint.

Cite this