Fabrication of a hydrogen sensor using palladium-coated silver dendrites formed electrochemically

Shin Bok Lee, Ho Young Lee, Eunsongyi Lee, Wooyoung Lee, Young Chang Joo

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Here, we report a cost-effective method for making palladium-coated silver (Ag) dendrites for hydrogen sensing. Ag dendrites, 50-150 nm in diameter, are made through electrochemical migration in a micro-electrochemical cell. They are then coated with a 200-nm-thick palladium (Pd) thin film. The hydrogen sensor made of palladium-coated Ag dendrites showed better hydrogen sensing characteristics than ones made of a pure Pd film. This is due to the large surface area of the Ag dendrites. Heat-treatment made the hydrogen sensing curve more stable, which is attributable to an alloying effect between Pd and Ag.

Original languageEnglish
Pages (from-to)789-792
Number of pages4
JournalMetals and Materials International
Volume16
Issue number5
DOIs
Publication statusPublished - 2010 Oct 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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