کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7145497 | 1462069 | 2016 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Room temperature pH-dependent ammonia gas sensors using graphene quantum dots
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Room temperature pH-dependent ammonia gas sensors using graphene quantum dots Room temperature pH-dependent ammonia gas sensors using graphene quantum dots](/preview/png/7145497.png)
چکیده انگلیسی
We report a simple solution-process route to realize ammonia (NH3) gas sensor based on graphene quantum dots (GQDs). Transmission electron microscopy analysis confirmed that the 8-10Â nm GQDs were formed from multi-walled carbon nanotubes by using ultrasonication treatment. The as-fabricated gas sensor showed promising selectivity response when expose to NH3 ambient at room temperature. It is indicated that by adjusting the pH value of the aqueous GQDs in acidic and neutral, two types of gas sensors with contrary current responses could be obtained, which might be resulted from quantum confinement, edge effects and presence of functional groups on GQDs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 222, January 2016, Pages 763-768
Journal: Sensors and Actuators B: Chemical - Volume 222, January 2016, Pages 763-768
نویسندگان
Wei Chen, Fushan Li, Poh Choon Ooi, Yun Ye, Tae Whan Kim, Tailiang Guo,