کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7145236 | 1462070 | 2015 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Conductometric graphene sensors decorated with nanoclusters for selective detection of Hg2+ traces in water
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Mercury ion (Hg2+) sensors based on graphene and gold nanoclusters are presented in this work. The sensors follow the structure of field-effect transistor (FET), and their sensing mechanism relies on the change in conductance of graphene and gold nanocluster percolating film. Each sensor was fabricated by deposition of interdigitated metal electrodes on the surface of graphene by thermal evaporation through a shadow mask. Next, gold nanoclusters are generated by magnetron discharge sputtering and inert-gas condensation inside an ultra-high compatible system, and they are self-assembled on the surface of graphene. The sensitivity and selectivity of graphene to Hg2+ are vastly enhanced by incorporating the nanoclusters on its surface. The detection limit of the present sensors is below the safe concentration of Hg2+ in drinking water set by different universal agencies. In addition, those sensors are practical and easy to operate in field for real life applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 221, 31 December 2015, Pages 201-206
Journal: Sensors and Actuators B: Chemical - Volume 221, 31 December 2015, Pages 201-206
نویسندگان
Ahmad I. Ayesh, Zainab Karam, Falah Awwad, Mohammed A. Meetani,