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• Wang, Y
• Jia, W
• Strout, T
• Ding, Y
• Lei, Y
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• Wang, Y
• Jia, W
• Strout, T
• Ding, Y
• Lei, Y
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• Jia, W
• Strout, T
• Ding, Y
• Lei, Y

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Sensors 2009, 9(9), 6752-6763; doi:10.3390/s90906752

Article

Preparation, Characterization and Sensitive Gas Sensing of Conductive Core-sheath TiO₂-PEDOT Nanocables

Ying Wang, Wenzhao Jia, Timothy Strout, Yu Ding and Yu Lei*

Department of Chemical, Materials and Biomolecular Engineering, University of Connecticut, 191 Auditorium Road, Storrs, CT 06269, USA

* Author to whom correspondence should be addressed.

Received: 10 August 2009; in revised form: 20 August 2009 / Accepted: 21 August 2009 / Published: 27 August 2009

(This article belongs to the Special Issue Gas Sensors 2009)

Download PDF Full-Text [578 KB, uploaded 26 August 2009 19:44 CEST]

Abstract: Conductive core-sheath TiO₂-PEDOT nanocables were prepared using electrospun TiO₂ nanofibers as template, followed by vapor phase polymerization of EDOT. Various techniques were employed to characterize the sample. The results reveal that the TiO2 core has an average diameter of ~78 nm while the PEDOT sheath has a uniform thickness of ~6 nm. The as-prepared TiO₂-PEDOT nanocables display a fast and reversible response to gaseous NO₂ and NH₃ with a limit of detection as low as 7 ppb and 675 ppb (S/N=3), respectively. This study provides a route for the synthesis of conductive nanostructures which show excellent performance for sensing applications.

Keywords: poly(3,4-ethylenedioxythiophene); nanocables; gas sensor; vapor phase polymerization; electrospinning

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