Finite size effect on hydrogen gas sensing performance in single Pd nanowires

Kye Jin Jeon, Minhong Jeun, Eunsongyi Lee, Jun Min Lee, Kyoung Il Lee, Paul Von Allmen, Wooyoung Lee

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)


We present the hydrogen sensing performance of individual Pd nanowires grown by electrodeposition into nanochannels of anodized aluminum oxide (AAO) templates investigated as a function of the nanowire diameter. Four-terminal devices based on individual Pd nanowires were found to successfully detect hydrogen gas (H2). Our experimental results show that the H 2 sensing sensitivity increases and the response time decreases with decreasing diameter of Pd nanowires with d = 400, 200, 80 and 20 nm, due to the high surface-to-volume ratio and short diffusion paths, respectively. This is in qualitatively good agreement with simulated results obtained from a theoretical model based on a combination of the rate equation and diffusion equation.

Original languageEnglish
Article number495501
Issue number49
Publication statusPublished - 2008 Dec 10

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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