期刊
IEEE SENSORS JOURNAL
卷 11, 期 11, 页码 2947-2951出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2011.2150213
关键词
Chemical sensors; gas detectors; explosive detectors; nanostructured materials
资金
- U.S. Army Research Grant
In this contribution, we report fluorescent gas chemosensors for detection of nitroaromatic vapors and other classes of volatile organic compounds based on porous silicon (PSi) microcavity (MC) infiltrated with sensory emissive polymers. Such hybrid functional sensors have several advantages over traditional fluorescent chemosensors, where the sensory polymers are deposited on flat substrate. This includes a high interfacial area of nanoporous Si (high sensitivity), narrow fluorescent band due to photon confinement, dependence of the spectral peak position on nature of analyte (enhanced selectivity), and fast recovery time. We demonstrated that deep and uniform polymer infiltration is critical for effective gas sensing and investigated the experimental conditions required for preparation of high-quality hybrid sensors. In the case of deep infiltration, the broad polymer fluorescence (FWHM similar to 100 nm) shows a narrowing to the resonance peak (FWHM similar to 10 nm) with narrow intensity angle diagram. In addition, the potential of the sensor array platform and sensor recovery under ultrasound power is discussed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据