Analytical Calculation of Sensing Parameters on Carbon Nanotube Based Gas Sensors
| Autor: | Hediyeh Karimi, Aria Enzevaee, Mohammad Taghi Ahmadi, Muhammad Abu Bakar Sidik, Syed Muhammad Zafar Iqbal, Elnaz Akbari, Zolkafle Buntat, Mohd Hafizi Ahmad, Rubiyah Yousof |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Work (thermodynamics)
Nanotube Materials science Silicon Transistors Electronic chemistry.chemical_element Nanotechnology Carbon nanotube lcsh:Chemical technology Biochemistry Article Analytical Chemistry law.invention Condensed Matter::Materials Science NH3 gas sensor Electrical resistance and conductance law Ammonia carbon nanotubes (CNTs) lcsh:TP1-1185 I–V characteristic field effect transistor (FET) Electrical and Electronic Engineering Instrumentation business.industry Nanotubes Carbon Temperature Conductance Atomic and Molecular Physics and Optics chemistry Optoelectronics Field-effect transistor Adsorption Gases business Carbon |
| Zdroj: | Sensors (Basel, Switzerland) Sensors; Volume 14; Issue 3; Pages: 5502-5515 Sensors, Vol 14, Iss 3, Pp 5502-5515 (2014) |
| ISSN: | 1424-8220 |
| Popis: | Carbon Nanotubes (CNTs) are generally nano-scale tubes comprising a network of carbon atoms in a cylindrical setting that compared with silicon counterparts present outstanding characteristics such as high mechanical strength, high sensing capability and large surface-to-volume ratio. These characteristics, in addition to the fact that CNTs experience changes in their electrical conductance when exposed to different gases, make them appropriate candidates for use in sensing/measuring applications such as gas detection devices. In this research, a model for a Field Effect Transistor (FET)-based structure has been developed as a platform for a gas detection sensor in which the CNT conductance change resulting from the chemical reaction between NH3 and CNT has been employed to model the sensing mechanism with proposed sensing parameters. The research implements the same FET-based structure as in the work of Peng et al. on nanotube-based NH3 gas detection. With respect to this conductance change, the I–V characteristic of the CNT is investigated. Finally, a comparative study shows satisfactory agreement between the proposed model and the experimental data from the mentioned research. |
| Databáze: | OpenAIRE |
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