Nanoscale Heterostructures Based on Fe2O3@WO3-x Nanoneedles and Their Direct Integration into Flexible Transducing Platforms for Toluene Sensing

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• 作者：Stella Vallejos ; Isabel Gr脿cia ; Eduardo Figueras ; Carles Can茅
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 26, 2015
• 年：2015
• 卷：7
• 期：33
• 页码：18638-18649
• 全文大小：752K
• ISSN：1944-8252

文摘

Nanoscale heterostructures based on WO_3鈥?i>x nanoneedles functionalized with Fe₂O₃ nanoparticles are integrated directly into flexible polymer-based transducing platforms via aerosol-assisted chemical vapor deposition. Results demonstrate that the incorporation of Fe₂O₃ nanoparticles at the surface of WO_3鈥?i>x nanoneedles enhances the electronic and sensing properties of WO_3鈥?i>x, providing a 6-fold increase in sensitivity to toluene and low cross-sensitivity to hydrogen and ethanol. These enhanced-sensing properties are comparable to those obtained via functionalization with precious metal (Pt) nanoparticles, which are commonly used to enhance sensor performance.