Real-time detection of chlorine gas using Ni/Si shell/core nanowires
- Authors
- Lee, Dong-Jin; Heo, Kwang; Lee, Hyungwoo; Jin, Joon-Hyung; Chang, Hochan; Park, Minjun; Lee, Han-Bo-Ram; Kim, Hyungjun; Lee, Byung Yang
- Issue Date
- 28-1월-2015
- Publisher
- SPRINGEROPEN
- Keywords
- Nanowires; Self-assembly; Atomic layer deposition; Sensor; Halogen gas
- Citation
- NANOSCALE RESEARCH LETTERS, v.10, pp.1 - 8
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE RESEARCH LETTERS
- Volume
- 10
- Start Page
- 1
- End Page
- 8
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/94609
- DOI
- 10.1186/s11671-015-0729-2
- ISSN
- 1931-7573
- 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.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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