Real-time detection of chlorine gas using Ni/Si shell/core nanowires

Dong Jin Lee, Kwang Heo, Hyungwoo Lee, Joon Hyung Jin, Hochan Chang, Minjun Park, Han Bo Ram Lee, Hyungjun Kim, Byung Yang Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)


We demonstrate the selective adsorption of Ni/Si shell/core nanowires (Ni-Si NWs) with a Ni outer shell and a Si inner core on molecularly patterned substrates and their application to sensors for the detection of chlorine gas, a toxic halogen gas. The molecularly patterned substrates consisted of polar SiO2 regions and nonpolar regions of self-assembled monolayers of octadecyltrichlorosilane (OTS). The NWs showed selective adsorption on the polar SiO2 regions, avoiding assembly on the nonpolar OTS regions. Utilizing these assembled Ni-Si NWs, we demonstrate a sensor for the detection of chlorine gas. The utilization of Ni-Si NWs resulted in a much larger sensor response of approximately 23% to 5 ppm of chlorine gas compared to bare Ni NWs, due to the increased surface-to-volume ratio of the Ni-Si shell/core structure. We expect that our sensor will be utilized in the future for the real-time detection of halogen gases including chlorine with high sensitivity and fast response.

Original languageEnglish
Article number18
Pages (from-to)1-7
Number of pages7
JournalNanoscale Research Letters
Issue number1
Publication statusPublished - 2015


  • Atomic layer deposition
  • Halogen gas
  • Nanowires
  • Self-assembly
  • Sensor

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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    Lee, D. J., Heo, K., Lee, H., Jin, J. H., Chang, H., Park, M., Lee, H. B. R., Kim, H., & Lee, B. Y. (2015). Real-time detection of chlorine gas using Ni/Si shell/core nanowires. Nanoscale Research Letters, 10(1), 1-7. [18].