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Imogolite as an electron emitter and a water sensor

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Abstract

We investigated field emission (FE) properties of imogolite including the turn-on field and lifetime stability. Imogolite is an excellent electron emitter with a turn-on field of approximately 2.5–3.5 V/μm. A lifetime test revealed that imogolite protects itself during FE under exposure to O2 gas. We also measured the current–voltage characteristics of the imogolite as a function of the amount of water adsorbed on the surface. The results suggested that the electrode-containing imogolite device could be a useful water sensor in a nanoscale environment.

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Acknowledgments

This work was supported by the “Korean Science and Engineering Foundation” sponsoring “Advanced Basic Research Lab. R14-2003-014-01001-0”, and “Basic Research Program, R01-2006-000-10396-0”, and “Ministry of Education and Human Resources Development” sponsoring “The Second Stage of BK21”.

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Authors and Affiliations

  1. Department of Chemistry, Hanyang University, Haengdang-dong 17, Seoul, 133-791, Korea

    Jihoon Oh, Sunyoung Chang, Jiyoung Jang, Seungkwang Roh, Jaehong Park, Jungwoo Lee, Daewon Sohn & Whikun Yi

  2. Division of Nanosciences and Department of Chemistry, Ewha Womans University, Seoul, 120-750, Korea

    Yeongri Jung & Sung-Jin Kim

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  1. Jihoon Oh
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  2. Sunyoung Chang
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  3. Jiyoung Jang
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  8. Whikun Yi
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Correspondence to Whikun Yi.

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Oh, J., Chang, S., Jang, J. et al. Imogolite as an electron emitter and a water sensor. J Mater Sci: Mater Electron 18, 893–897 (2007). https://doi.org/10.1007/s10854-007-9125-8

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  • DOI: https://doi.org/10.1007/s10854-007-9125-8

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