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DOI	10.3390/s20020357
	An analytical conductance model for gas detection based on a zigzag carbon nanotube sensor
	Hosseingholipourasl A.; Ariffin S.H.S.; Ahmadi M.T.; Koloor S.S.R.; Petrů M.; Hamzah A.
发表日期	2020
ISSN	14248220
卷号	20 期号:2
英文摘要	Recent advances in nanotechnology have revealed the superiority of nanocarbon species such as carbon nanotubes over other conventional materials for gas sensing applications. In this work, analytical modeling of the semiconducting zigzag carbon nanotube field-effect transistor (ZCNT-FET) based sensor for the detection of gas molecules is demonstrated. We propose new analytical models to strongly simulate and investigate the physical and electrical behavior of the ZCNT sensor in the presence of various gas molecules (CO2, H2O, and CH4). Therefore, we start with the modeling of the energy band structure by acquiring the new energy dispersion relation for the ZCNT and introducing the gas adsorption effects to the band structure model. Then, the electrical conductance of the ZCNT is modeled and formulated while the gas adsorption effect is considered in the conductance model. The band structure analysis indicates that, the semiconducting ZCNT experiences band gap variation after the adsorption of the gases. Furthermore, the bandgap variation influences the conductance of the ZCNT and the results exhibit increments of the ZCNT conductance in the presence of target gases while the minimum conductance shifted upward around the neutrality point. Besides, the I-V characteristics of the sensor are extracted from the conductance model and its variations after adsorption of different gas molecules are monitored and investigated. To verify the accuracy of the proposed models, the conductance model is compared with previous experimental and modeling data and a good consensus is observed. It can be concluded that the proposed analytical models can successfully be applied to predict sensor behavior against different gas molecules. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
英文关键词	Analytical modeling; Carbon nanotube; Electrical conductance; Field-effect transistor; Gas sensor
scopus关键词	Carbon nanotube field effect transistors; Carbon nanotubes; Chemical sensors; Electric conductance; Electric field effects; Energy gap; Field effect transistors; Gas adsorption; Gas detectors; Gases; Molecules; Band gap variation; Band structure analysis; Band-structure model; Conventional materials; Electrical behaviors; Electrical conductance; Gas sensing applications; Zigzag carbon nanotubes; Analytical models
来源期刊	Sensors (Switzerland)
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176679
作者单位	UTM-MIMOS Center of Excellence in Telecommunication Technology, School of Electrical Engineering, Universiti Teknologi Malaysia, Skudai, Johor 81310, Malaysia; Division of Computational Physics, Institute for Computational Science and Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, 758307, Viet Nam; Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 2, Liberec, 461 17, Czech Republic; School of Electrical Engineering, Universiti Teknologi Malaysia, Skudai, Johor 81310, Malaysia
推荐引用方式 GB/T 7714	Hosseingholipourasl A.,Ariffin S.H.S.,Ahmadi M.T.,et al. An analytical conductance model for gas detection based on a zigzag carbon nanotube sensor[J],2020,20(2).
APA	Hosseingholipourasl A.,Ariffin S.H.S.,Ahmadi M.T.,Koloor S.S.R.,Petrů M.,&Hamzah A..(2020).An analytical conductance model for gas detection based on a zigzag carbon nanotube sensor.Sensors (Switzerland),20(2).
MLA	Hosseingholipourasl A.,et al."An analytical conductance model for gas detection based on a zigzag carbon nanotube sensor".Sensors (Switzerland) 20.2(2020).