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Imogolite as an electron emitter and a water sensor |
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| Authors: | Jihoon Oh Sunyoung Chang Jiyoung Jang Seungkwang Roh Jaehong Park Jungwoo Lee Daewon Sohn Whikun Yi Yeongri Jung Sung-Jin Kim |
| Affiliation: | (1) Department of Chemistry, Hanyang University, Haengdang-dong 17, Seoul, 133-791, Korea;(2) Division of Nanosciences and Department of Chemistry, Ewha Womans University, Seoul, 120-750, Korea |
| 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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