Gold cleaning methods for electrochemical detection applications

Research output: Contribution to journalArticle

Abstract

This work investigates methods for obtaining reliably clean gold film surfaces. Nine gold cleaning methods are investigated here: UV ozone photoreactor; potassium hydroxide–hydrogen peroxide; potassium hydroxide potential sweep; sulfuric acid hydrogen peroxide; sulfuric acid potential cycling; hydrochloric acid potential cycling; dimethylamine borane reducing agent solutions at 25 and 65 °C; and a dilute form of Aqua Regia. Peak-current potential-differences obtained from cyclic voltammetry and charge transfer resistance obtained from electrochemical impedance spectroscopy, as well as X-ray photo-electron spectroscopy are used to characterize surface cleanliness. A low peak-current potential-difference and charge transfer resistance indicates a cleaner surface, as does a higher percentage of elemental gold on the electrode surface. The potassium hydroxide potential sweep method is found to leave the gold surface the cleanest overall.

Details

Authors
  • Lee M. Fischer
  • Maria Tenje
  • Arto R. Heiskanen
  • Noriyuki Masuda
  • Jaime Castillo Leon
  • Anders Bentien
  • Jenny Emnéus
  • Mogens H. Jakobsen
  • Anja Boisen
External organisations
  • Technical University of Denmark
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Analytical Chemistry
  • Medical Engineering
Original languageEnglish
Pages (from-to)1282-1285
JournalMicroelectronic Engineering
Volume86
Issue number4-6
Publication statusPublished - 2009
Publication categoryResearch
Peer-reviewedYes
Externally publishedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Biomedical Engineering (011200011), Analytical Chemistry (S/LTH) (011001004)