Novel electrochemical method of fast and reproducible fabrication of metallic nanoelectrodes

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abstract

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. (C) 2014 AIP Publishing LLC.

keywords

SCANNING-TUNNELING-MICROSCOPY; TUNGSTEN TIPS; MICROELECTRODES; ELECTROHYDRODYNAMICS; ELECTRODE; SENSORS; WIRES; STM; PH

subject category

Instruments & Instrumentation; Physics

authors

Silva, EL; Silva, RF; Zheludkevich, M; Oliveira, FJ

our authors

foto Eduardo Luís Trindade da Silva

Eduardo Luís Trindade da Silva

Post-Doc Fellowship
foto Filipe José Alves de Oliveira

Filipe José Alves de Oliveira

Principal Researcher
foto Mikhail Zheludkevich

Mikhail Zheludkevich

Invited Principal Researcher
foto Rui Ramos Ferreira e Silva

Rui Ramos Ferreira e Silva

Associate Professor

Groups

G3 - Electrochemical Materials, Interfaces and Coatings

Projects

Corrosion adn corrosion protection in multi-material systems (PTDC/CTM/108446/2008)

BIOCORDIAN – Ultramicroelétrodos de SECM em Diamante Nanocristalino para Biologia e Corrosão (PTDC/CTM-MET/113645/2009)

Enhancing Scanning Ion-Selective Electrode Technique - SISET (SISET)

acknowledgements

E. L. Silva would like to acknowledge FCT for the Grant No. SFRH/BD/61675/2009. This work was supported by Project Nos. PTDC/CTM/108446/2008, PTDC/CTM-MET/113645/2009, funded by FEDER /COMPETE programme - Portuguese Science and Technology Foundation and by the SISET project (FP7-PEOPLE-2010-IRSES Reference 269282).

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Publication Details

type
Journal Article
year
2014
journal
REVIEW OF SCIENTIFIC INSTRUMENTS
volume
85
article number
95109
publisher
AMER INST PHYSICS
issn
0034-6748
issue
9
digital object identifier
10.1063/1.4895639
link
25273774
web of science article identifier
WOS:000342910500075

Journal Metrics (JCR 2019)

Journal Impact Factor
1.48
Journal Impact Factor (5 yrs)
1.456
category normalized journal percentile
32.351

Citations

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