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, Mann-Ho Cho, Myung Hwan Whangbo, Kyung-hwa Yoo, Sung Jin Kim

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

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
Volume13
Issue number12
DOIs
Publication statusPublished - 2013 Dec 11

Fingerprint

Nanowires
Hydrogen
nanowires
hydrogen
Nanoparticles
nanoparticles
room temperature
Gases
Oxidation
Temperature
oxidation
sensitivity
sensors
air
Sensors
Air
gases

All Science Journal Classification (ASJC) codes

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

Cite this

Jeong, S. H., Kim, S., Cha, J., Son, M. S., Park, S. H., Kim, H. Y., ... Kim, S. J. (2013). Hydrogen sensing under ambient conditions using SnO2 nanowires: Synergetic effect of Pd/Sn codeposition. Nano Letters, 13(12), 5938-5943. https://doi.org/10.1021/nl402998g
Jeong, Seung Ho ; Kim, Sol ; Cha, Junho ; Son, Min Soo ; Park, Sang Han ; Kim, Ha Yeong ; Cho, Mann-Ho ; Whangbo, Myung Hwan ; Yoo, Kyung-hwa ; Kim, Sung Jin. / Hydrogen sensing under ambient conditions using SnO2 nanowires : Synergetic effect of Pd/Sn codeposition. In: Nano Letters. 2013 ; Vol. 13, No. 12. pp. 5938-5943.
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Jeong, SH, Kim, S, Cha, J, Son, MS, Park, SH, Kim, HY, Cho, M-H, Whangbo, MH, Yoo, K & Kim, SJ 2013, 'Hydrogen sensing under ambient conditions using SnO2 nanowires: Synergetic effect of Pd/Sn codeposition', Nano Letters, vol. 13, no. 12, pp. 5938-5943. https://doi.org/10.1021/nl402998g

Hydrogen sensing under ambient conditions using SnO2 nanowires : Synergetic effect of Pd/Sn codeposition. / Jeong, Seung Ho; Kim, Sol; Cha, Junho; Son, Min Soo; Park, Sang Han; Kim, Ha Yeong; Cho, Mann-Ho; Whangbo, Myung Hwan; Yoo, Kyung-hwa; Kim, Sung Jin.

In: Nano Letters, Vol. 13, No. 12, 11.12.2013, p. 5938-5943.

Research output: Contribution to journalArticle

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T2 - Synergetic effect of Pd/Sn codeposition

AU - Jeong, Seung Ho

AU - Kim, Sol

AU - Cha, Junho

AU - Son, Min Soo

AU - Park, Sang Han

AU - Kim, Ha Yeong

AU - Cho, Mann-Ho

AU - Whangbo, Myung Hwan

AU - Yoo, Kyung-hwa

AU - Kim, Sung Jin

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AB - 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.

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