Hydrogen sensing under ambient conditions using SnO2 nanowires: Synergetic effect of Pd/Sn codeposition

Seung Ho Jeong, Sol Kim, Junho Cha, Min Soo Son, Sang Han Park, Ha Yeong Kim, Man Ho Cho, Myung Hwan Whangbo, Kyung Hwa Yoo, Sung Jin Kim

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


Semiconducting SnO2 nanowires deposited with Pd and Sn nanoparticles on their surface are shown to be a highly sensitive hydrogen sensor with fast response time at room temperature. Compared with the SnO 2 nanowire deposited with Pd or Sn nanoparticles alone, the Pd/Sn-deposited SnO2 nanowire exhibits a significant improvement in the sensitivity and reversibility of sensing hydrogen gas in the air at room temperature. Our investigation indicates that two factors are responsible for the synergistic effect of Pd/Sn codeposition on SnO2 nanowires. One is that in the presence of Pd the oxidation of Sn nanoparticles on the surface of the SnO2 nanowire is incomplete leading only to suboxides SnO x (1 ≤ x < 2), and the other is that the surface of the Pd/Sn-deposited SnO2 nanowire is almost perfectly hydrophobic.

Original languageEnglish
Pages (from-to)5938-5943
Number of pages6
JournalNano letters
Issue number12
Publication statusPublished - 2013 Dec 11

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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