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

doi:10.1007/s12540-010-1015-6

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

11 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 language	English
Pages (from-to)	789-792
Number of pages	4
Journal	Metals and Materials International
Volume	16
Issue number	5
DOIs	https://doi.org/10.1007/s12540-010-1015-6
Publication status	Published - 2010 Oct

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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10.1007/s12540-010-1015-6

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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.",

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AU - Lee, Shin Bok

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AU - Lee, Wooyoung

AU - Joo, Young Chang

PY - 2010/10

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N2 - 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.

AB - 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.

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

Abstract

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