Integration of metal oxide nanobelts with microsystems for nerve agent detection

Choongho Yu, Qing Hao, Sanjoy Saha, Li Shi, Xiangyang Kong, Z. L. Wang

Research output: Contribution to journalArticle

139 Scopus citations

Abstract

We have assembled tin dioxide nanobelts with low-power microheaters for detecting dimethyl methylphosphonate (DMMP), a nerve agent simulant. The electrical conductance of a heated nanobelt increased for 5% upon exposure to 78 parts per billion DMMP in air. The nanobelt conductance recovered fully quickly after the DMMP was shut off, suggesting that the single-crystal nanobelt was not subject to poisoning often observed in polycrystalline metal oxide sensors. While the sensitivity can be improved via doping nanobelts with catalytic additives, directed assembly or growth of nanobelts on microsystems will potentially allow for the large-scale fabrication of nanosensor arrays.

Original languageEnglish (US)
Article number063101
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number6
DOIs
StatePublished - Feb 7 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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