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 journalArticlepeer-review

5 Citations (Scopus)

Abstract

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
Volume10
Issue number1
DOIs
Publication statusPublished - 2015

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Real-time detection of chlorine gas using Ni/Si shell/core nanowires'. Together they form a unique fingerprint.

Cite this