Detection of ions and radicals by using single-walled carbon nanotubes

Sehun Jung, Jaeboong Choi, Seunghyun Hong, Youngjin Kim, Seunghyun Baik, Jongchul Lee

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    3 Scopus citations


    Single-walled carbon-nanotube (SWNT) sensors, fabricated by using alternative current dielectrophoresis, were used to detect decomposed ions and radicals in plasma. In this work, we monitored the electrical conductance of the SWNT sensors in argon (Ar) and sulfur hexafluoride (SF6) plasma. Ar and SF6 were decomposed in plasma status. The electrical conductance of the SWNT arrays in Ar plasma increased due to an electronic interaction between SWNT and oxidative decomposed ions. In contrast, the nanotube arrays in SF6 plasma exhibited a drastic decrease in conductance due to the fluorination of the SWNT by decomposed radicals, rather than charge transfer by decomposed ions. These results demonstrate that electronic detection of the decomposed ions and radicals is possible with SWNT sensors.

    Original languageBritish English
    Pages (from-to)S7-S10
    JournalJournal of the Korean Physical Society
    Issue numberSUPPL. 1
    StatePublished - Jul 2007


    • Argon
    • Decomposition
    • Plasma
    • Single-walled carbon nanotubes
    • Sulfur hexafluoride


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