Design rules for nanogap-based hydrogen gas sensors

Junmin Lee, Wooyoung Shim, Jin Seo Noh, Wooyoung Lee

Research output: Contribution to journalReview article

37 Citations (Scopus)

Abstract

Nanoscale gaps, which enable many research applications in fields such as chemical sensors, single-electron transistors, and molecular switching devices, have been extensively investigated over the past decade and have witnessed the evolution of related technologies. Importantly, nanoscale gaps employed in hydrogen-gas (H 2) sensors have been used to reversibly detect H 2 in an On-Off manner, and function as platforms for enhancing sensing performance. Herein, we review recent advances in nanogap design for H 2 sensors and deal with various strategies to create these gaps, including fracture generation by H 2 exposure, deposition onto prestructured patterns, island formation on a surface, artificial manipulation methods, methods using hybrid materials, and recent approaches using elastomeric substrates. Furthermore, this review discusses a new nanogap design that advances sensing capabilities in order to meet the diverse needs of academia and industry. Mind the gap: Various approaches for the formation of nanogaps in palladium-based nanostructures (see picture) have been investigated during the last decade to realize an optimized hydrogen gas sensor. Despite multilateral approaches to create various types of nanogaps, however, critical issues remain to be solved. To tackle the existing issues with nanogaps, design rules and recent advances with nanogaps are reviewed.

Original languageEnglish
Pages (from-to)1395-1403
Number of pages9
JournalChemPhysChem
Volume13
Issue number6
DOIs
Publication statusPublished - 2012 Apr 23

Fingerprint

Chemical sensors
Hydrogen
sensors
hydrogen
gases
Single electron transistors
Hybrid materials
Sensors
Palladium
single electron transistors
Nanostructures
Gases
palladium
manipulators
platforms
industries
Substrates
Industry

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Lee, Junmin ; Shim, Wooyoung ; Noh, Jin Seo ; Lee, Wooyoung. / Design rules for nanogap-based hydrogen gas sensors. In: ChemPhysChem. 2012 ; Vol. 13, No. 6. pp. 1395-1403.
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Design rules for nanogap-based hydrogen gas sensors. / Lee, Junmin; Shim, Wooyoung; Noh, Jin Seo; Lee, Wooyoung.

In: ChemPhysChem, Vol. 13, No. 6, 23.04.2012, p. 1395-1403.

Research output: Contribution to journalReview article

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