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Review of Scientific InstrumentsVolume 75, Issue 4, April 2004, Pages 837-841

Preparation of gold tips suitable for tip-enhanced Raman spectroscopy and light emission by electrochemical etching(Article)

  • aDepartment of Chemistry, Xiamen University, Xiamen 361005, China
  • bFritz-Haber-Inst. der MPG, Faradayweg 4-6, D-14195 Berlin, Germany

Abstract

A benign method for an easy and quick production of smooth gold tips with a sharp apex, evidently very suitable for tip enhanced Raman study and light emission studies is described. Tips with radii around or smaller than 30 nm and smooth surfaces can be reproducibly produced by etching in solutions mixed by fuming HCl and ethanol (1:1) using dc electrochemical method at 2.2 to 2.4 V. As additional advantage, the chemical inertness of Au allows to tip to be used for several sets of experiments.

Indexed keywords

Engineering controlled terms:EtchingEthanolGoldHelium neon lasersHydrochloric acidInterfaces (materials)Light emissionRaman spectroscopySurface structureTemperature
Engineering uncontrolled terms:Benign etching methodElectrochemical etchingGold oxidesMalachite green isothiocyanateTip-enhanced Raman spectroscopy
Engineering main heading:Scanning tunneling microscopy
  • ISSN: 00346748
  • CODEN: RSINA
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1063/1.1688442
  • Document Type: Article

  Ren, B.; Department of Chemistry, Xiamen University, China;
© Copyright 2008 Elsevier B.V., All rights reserved.

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