Detection of CO and O2 Using Tin Oxide Nanowire Sensors


  • We thank Prof. A. Heeger, Dr. D. Moses, and Dr. G. Wang for the loan of essential equipment and for many helpful discussions. We are grateful to Mr. E. Caine and Dr. J. P. Zhang for their help with lithography and HREM. This work made extensive use of the MRL Central Facilities at UCSB supported by the National Science Foundation under award No. DMR96-32716.


Highly uniform SnO2 nanowires, with bulk electronic properties directed by their surface chemistry, have been produced by isolating and oxidizing tin nanowires selected from a template-synthesized array. The nanowires act as sensitive, fast, stable, and reproducible gas sensors that can be easily integrated into a multi-component array (see Figure).