Imogolite as an electron emitter and a water sensor

Jihoon Oh, Sunyoung Chang, Jiyoung Jang, Seungkwang Roh, Jaehong Park, Jungwoo Lee, Daewon Sohn, Whikun Yi, Yeongri Jung, Sung Jin Kim

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


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 O 2 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.

Original languageEnglish
Pages (from-to)893-897
Number of pages5
JournalJournal of Materials Science: Materials in Electronics
Issue number8
StatePublished - Aug 2007

Bibliographical note

Funding Information:
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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