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Title: Novel electrochemical method of fast and reproducible fabrication of metallic nanoelectrodes

A novel electrochemical wire etching method of fabrication of ultrasharp nanoelectrodes is reported. Tungsten wires can be sharpened to less than 10 nm tip radius in a reproducible manner in less than 1 min by using controllable hydrodynamic electrolyte flow combined with optimized electrochemical etching parameters. The method relies on the variations of the electric field at the surface of a metal wire, while the electrolyte solution is in motion, rather than on the ionic gradient generated in a static solution.
Authors:
; ;  [1] ;  [1] ;  [2]
  1. CICECO – Department of Materials and Ceramics Engineering, University of Aveiro, Aveiro (Portugal)
  2. (Germany)
Publication Date:
OSTI Identifier:
22314461
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ELECTRIC FIELDS; ELECTROCHEMISTRY; ELECTRODES; ELECTROLYTES; ETCHING; NANOSTRUCTURES; SURFACES; TUNGSTEN; VARIATIONS; WIRES