Electrochemical Etching Gold Tips

Araz M.Salih and Diyar A. S. Sadiq Mayi
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Araz M.Salih: University of Zakho, Kurdistan Region, Iraq
Diyar A. S. Sadiq Mayi: University of Zakho, Kurdistan Region, Iraq

Technium, 2020, vol. 2, issue 5, 182-186

Abstract: In this work, we propose a simple and easy method to produce sharp and smooth conical gold tips for atomic force microscope and scanning near-field optical microscopy. The method is electrochemically etching process, based on gold, Pt wire and HCl acid (37%) as a solution. Comparing to other methods, we use only HCl as electrolyte. A function generator was used to produce rectangular pulse wave with 3 kHz and 7 V to obtain smooth and very sharp conical tip with diameter less than 10 nm. By controlling etching parameters (pulse shape, frequency and voltage), the fabricated etching tip achieved about 80% yields. Moreover, the etching time is about 13 second, which is very fast etching process. This method provides a suited tip for tip-enhanced Raman scattering, adiabatic nanofocusing of aperturless-scanning near-field optical microscopy and field emission electron microscopy.

Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:tec:techni:ojs:1316

DOI: 10.47577/technium.v2i5.1316

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