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المؤلفTurner, A.
المؤلفMcCoy, T.
المؤلفCao, W.
المؤلفKaroui, A.
المؤلفMaswadeh, W.M.
المؤلفVlahovic, B.
المؤلفElsayed-Ali, H.E.
المؤلفDaniel, B.
المؤلفCastro, M.
المؤلفSadasivuni, Kishor Kumar
المؤلفElahi, M.
المؤلفAdedeji, A.
المؤلفKumar, B.
تاريخ الإتاحة2022-03-23T06:54:33Z
تاريخ النشر2020
اسم المنشورNano-Structures and Nano-Objects
المصدرScopus
المعرّفhttp://dx.doi.org/10.1016/j.nanoso.2020.100578
معرّف المصادر الموحدhttp://hdl.handle.net/10576/28631
الملخصDetection of vapor phase analytes and gas molecules is primarily essential for numerous applications including medical diagnostic, environmental monitoring, chemical threat detection, food quality control, and chemical warfare agents. Here, we developed Caffeine functionalized carbon nanotubes (CNTs) random network based vapor quantum resistive sensors (vQRSs) for volatile organic compounds (VOCs) detection. The localized transmission electron microscopy (TEM) image and energy dispersive X-ray spectroscopy (EDS) confirm migration of caffeine to CNT?CNT junction (CNTj). We have recorded more than one order of magnitude higher sensitivity and unique selectivity towards? selective VOCs (e.g., acetone, toluene, ethanol, methanol, etc.) with short response time (few seconds) for caffeine modified CNT junction (Caf-CNTj) vQRSs. Molecular dynamics (MD) calculations suggest that the sensitivity of the sensor is diffusion limited, with an advective contribution for ethanol. The designed Caf-CNTj sensors can potentially be important candidate to be a part of electronic nose used for various application such as breath analysis and food quality monitoring.
راعي المشروعA.T., T.M., and B.K. efforts were supported by Qatar National Research Fund (Grant No.- NPRP11S-1221-170116 ), and the Office of Naval Research ( N00014-17-1-2331 ) at ECSU. K.K.S efforts were supported by Qatar National Research Fund (Grant No.- NPRP11S-1221-170116 ). A. K., W.M.M, and B.V. acknowledge funding from awards Department of Defense ( D01-W911SR-14-2-0001-0029 ) and Department of Homeland Security ( DHS 2016-ST-062-000004 ).
اللغةen
الناشرElsevier B.V.
الموضوعCaffeine
Carbon nanotubes
Diffusion
Functionalization
Molecular dynamics
Sensors
Volatile organic compounds
العنوانEnhanced detection of volatile organic compounds (VOCs) by caffeine modified carbon nanotube junctions
النوعArticle
رقم المجلد24
dc.accessType Abstract Only


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