Strain-controlled nanocrack formation in a Pd film on polydimethylsiloxane for the detection of low H2 concentrations

Sungyeon Kim; Hyun Sook Lee; Byungjin Jang; Sungmee Cho; Wooyoung Lee

doi:10.1007/s10853-016-9765-2

Strain-controlled nanocrack formation in a Pd film on polydimethylsiloxane for the detection of low H₂ concentrations

Sungyeon Kim, Hyun Sook Lee, Byungjin Jang, Sungmee Cho, Wooyoung Lee

Department of Materials Science and Engineering

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

8 Citations (Scopus)

Abstract

We report quantitative nanocrack formation upon adjusting the mechanical tensile strain applied to a Pd thin film on an elastomeric polydimethylsiloxane (PDMS) substrate and its detection properties for H₂ gas in air. Nanocrack formation in Pd/PDMS substrates was controlled through the application of tensile strains that varied in the range 30–120 % during mechanical stretching/compression. This method can be used to modulate nanocrack formation along both the x- and y-axes over a large area. Increasing the applied tensile strain to 90 % induced the appearance of horizontal cracks along the y-axis in addition to an increased number of vertical cracks along the x-axis. When the strain reached 120 %, ordered nanocracks abundantly propagated on the Pd surface in both the directions. Gas detection properties were dramatically enhanced, with a very low detection limit of 50 ppm H₂ in air observed for 120 % strain. This was attributed to the large surface area in the Pd nanocrack pattern, which readily allowed for volume expansion. These results provide a simple mechanism for controlling the detection properties of H₂ gas sensors with low detection limits in air.

Original language	English
Pages (from-to)	4530-4537
Number of pages	8
Journal	Journal of Materials Science
Volume	51
Issue number	9
DOIs	https://doi.org/10.1007/s10853-016-9765-2
Publication status	Published - 2016 May 1

Bibliographical note

Funding Information:
This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093823). This subject is also supported by Korea Ministry of Environment as Convergence Technology Program (2015001650001).

Publisher Copyright:
© 2016, Springer Science+Business Media New York.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1007/s10853-016-9765-2

Cite this

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title = "Strain-controlled nanocrack formation in a Pd film on polydimethylsiloxane for the detection of low H2 concentrations",

abstract = "We report quantitative nanocrack formation upon adjusting the mechanical tensile strain applied to a Pd thin film on an elastomeric polydimethylsiloxane (PDMS) substrate and its detection properties for H2 gas in air. Nanocrack formation in Pd/PDMS substrates was controlled through the application of tensile strains that varied in the range 30–120 % during mechanical stretching/compression. This method can be used to modulate nanocrack formation along both the x- and y-axes over a large area. Increasing the applied tensile strain to 90 % induced the appearance of horizontal cracks along the y-axis in addition to an increased number of vertical cracks along the x-axis. When the strain reached 120 %, ordered nanocracks abundantly propagated on the Pd surface in both the directions. Gas detection properties were dramatically enhanced, with a very low detection limit of 50 ppm H2 in air observed for 120 % strain. This was attributed to the large surface area in the Pd nanocrack pattern, which readily allowed for volume expansion. These results provide a simple mechanism for controlling the detection properties of H2 gas sensors with low detection limits in air.",

author = "Sungyeon Kim and Lee, {Hyun Sook} and Byungjin Jang and Sungmee Cho and Wooyoung Lee",

note = "Funding Information: This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093823). This subject is also supported by Korea Ministry of Environment as Convergence Technology Program (2015001650001). Publisher Copyright: {\textcopyright} 2016, Springer Science+Business Media New York.",

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AU - Cho, Sungmee

AU - Lee, Wooyoung

N1 - Funding Information: This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093823). This subject is also supported by Korea Ministry of Environment as Convergence Technology Program (2015001650001). Publisher Copyright: © 2016, Springer Science+Business Media New York.

PY - 2016/5/1

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N2 - We report quantitative nanocrack formation upon adjusting the mechanical tensile strain applied to a Pd thin film on an elastomeric polydimethylsiloxane (PDMS) substrate and its detection properties for H2 gas in air. Nanocrack formation in Pd/PDMS substrates was controlled through the application of tensile strains that varied in the range 30–120 % during mechanical stretching/compression. This method can be used to modulate nanocrack formation along both the x- and y-axes over a large area. Increasing the applied tensile strain to 90 % induced the appearance of horizontal cracks along the y-axis in addition to an increased number of vertical cracks along the x-axis. When the strain reached 120 %, ordered nanocracks abundantly propagated on the Pd surface in both the directions. Gas detection properties were dramatically enhanced, with a very low detection limit of 50 ppm H2 in air observed for 120 % strain. This was attributed to the large surface area in the Pd nanocrack pattern, which readily allowed for volume expansion. These results provide a simple mechanism for controlling the detection properties of H2 gas sensors with low detection limits in air.

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