تقرير
Graphene-based quantum capacitance wireless vapor sensors
| العنوان: | Graphene-based quantum capacitance wireless vapor sensors |
|---|---|
| المؤلفون: | Deen, David A., Olson, Eric J., Ebrish, Mona A., Koester, Steven J. |
| سنة النشر: | 2013 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | A wireless vapor sensor based upon the quantum capacitance effect in graphene is demonstrated. The sensor consists of a metal-oxide-graphene variable capacitor (varactor) coupled to an inductor, creating a resonant oscillator circuit. The resonant frequency is found to shift in proportion to water vapor concentration for relative humidity (RH) values ranging from 1% to 97% with a linear frequency shift of 5.7 +- 0.3 kHz / RH%. The capacitance values extracted from the wireless measurements agree with those determined from capacitance-voltage measurements, providing strong evidence that the sensing arises from the variable quantum capacitance in graphene. These results represent a new sensor transduction mechanism and pave the way for graphene quantum capacitance sensors to be studied for a wide range of chemical and biological sensing applications. Comment: 8 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1306.6940 |
| رقم الأكسشن: | edsarx.1306.6940 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |