Mesoporous WO3 Nanofibers with Protein-Templated Nanoscale Catalysts for Detection of Trace Biomarkers in Exhaled Breath

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• 作者：Sang-Joon Kim ; Seon-Jin Choi ; Ji-Soo Jang ; Nam-Hoon Kim ; Meggie Hakim ; Harry L. Tuller ; Il-Doo Kim
• 刊名：ACS Nano
• 出版年：2016
• 出版时间：June 28, 2016
• 年：2016
• 卷：10
• 期：6
• 页码：5891-5899
• 全文大小：694K
• 年卷期：0
• ISSN：1936-086X

文摘

Highly selective detection, rapid response (<20 s), and superior sensitivity (R_air/R_gas> 50) against specific target gases, particularly at the 1 ppm level, still remain considerable challenges in gas sensor applications. We propose a rational design and facile synthesis concept for achieving exceptionally sensitive and selective detection of trace target biomarkers in exhaled human breath using a protein nanocage templating route for sensitizing electrospun nanofibers (NFs). The mesoporous WO₃ NFs, functionalized with well-dispersed nanoscale Pt, Pd, and Rh catalytic nanoparticles (NPs), exhibit excellent sensing performance, even at parts per billion level concentrations of gases in a humid atmosphere. Functionalized WO₃ NFs with nanoscale catalysts are demonstrated to show great promise for the reliable diagnosis of diseases.