Kinetic control of nanocrack formation in a palladium thin film on an elastomeric substrate for hydrogen gas sensing in air

Sungyeon Kim, Byungjin Jang, Jongbin Park, Young-Kook Lee, Hyun Sook Lee, Sungmee Cho, Wooyoung Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We report the effects of various tensile velocities on the nanocrack formation in a Pd thin film on an elastomeric polydimethylsiloxane substrate and its H2 sensing properties. A tunable nanocrack along the x and y axes was created by mechanical stretching/compression cycles with varying tensile velocities. From the microstructural analyses, we found that the tensile velocity has a significant effect on the crack density but little effect on the average crack width. The Pd nanogap sensor prepared under a high tensile velocity showed a high performance with a low detection limit of 500 ppm of H2 in air. Our results indicate that the higher crack density with the narrow nanocrack width (55-100 nm) propagated over the entire film provides the enhanced H2 sensing properties in air.

Original languageEnglish
Pages (from-to)367-373
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume230
DOIs
Publication statusPublished - 2016 Jul 1

Fingerprint

Palladium
palladium
Hydrogen
Gases
Thin films
Kinetics
cracks
air
kinetics
Substrates
hydrogen
thin films
Air
Cracks
gases
Polydimethylsiloxane
Stretching
Compaction
cycles
elastomeric

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

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abstract = "We report the effects of various tensile velocities on the nanocrack formation in a Pd thin film on an elastomeric polydimethylsiloxane substrate and its H2 sensing properties. A tunable nanocrack along the x and y axes was created by mechanical stretching/compression cycles with varying tensile velocities. From the microstructural analyses, we found that the tensile velocity has a significant effect on the crack density but little effect on the average crack width. The Pd nanogap sensor prepared under a high tensile velocity showed a high performance with a low detection limit of 500 ppm of H2 in air. Our results indicate that the higher crack density with the narrow nanocrack width (55-100 nm) propagated over the entire film provides the enhanced H2 sensing properties in air.",
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Kinetic control of nanocrack formation in a palladium thin film on an elastomeric substrate for hydrogen gas sensing in air. / Kim, Sungyeon; Jang, Byungjin; Park, Jongbin; Lee, Young-Kook; Lee, Hyun Sook; Cho, Sungmee; Lee, Wooyoung.

In: Sensors and Actuators, B: Chemical, Vol. 230, 01.07.2016, p. 367-373.

Research output: Contribution to journalArticle

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AU - Kim, Sungyeon

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AU - Park, Jongbin

AU - Lee, Young-Kook

AU - Lee, Hyun Sook

AU - Cho, Sungmee

AU - Lee, Wooyoung

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AB - We report the effects of various tensile velocities on the nanocrack formation in a Pd thin film on an elastomeric polydimethylsiloxane substrate and its H2 sensing properties. A tunable nanocrack along the x and y axes was created by mechanical stretching/compression cycles with varying tensile velocities. From the microstructural analyses, we found that the tensile velocity has a significant effect on the crack density but little effect on the average crack width. The Pd nanogap sensor prepared under a high tensile velocity showed a high performance with a low detection limit of 500 ppm of H2 in air. Our results indicate that the higher crack density with the narrow nanocrack width (55-100 nm) propagated over the entire film provides the enhanced H2 sensing properties in air.

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