Separation and enrichment of semiconducting carbon nanotubes and its application to highly sensitive carbon nanotube gas sensor

Fujioka, Masahiko; Watanabe, Hideaki; Martin, Yul; Nakano, Michihiko; Suehiro, Junya

doi:10.1109/nmdc.2011.6155387

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…The DEP method has been used to fabricate CNT-based gas sensors to detect NH 3 [242], H 2 [216], and NO 2 [243,244]. Due to their remarkable optical properties, CNTs are assembled using DEP and used to detect infrared (IR) light [245].…”

Section: Sensor Devicesmentioning

confidence: 99%

Dielectrophoretic alignment of carbon nanotubes: theory, applications, and future

2023

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Carbon nanotubes (CNTs) are nominated to be the successor of several semiconductors and metals due to their unique physical and chemical properties. It has been concerning that the anisotropic and low controllability of CNTs impedes their adoption in commercial applications. Dielectrophoresis (DEP) is known as the electrokinetics motion of polarizable nanoparticles under the influence of non-uniform electric fields. The uniqueness of this phenomenon allows DEP to be employed as a novel method to align, assemble, separate, and manipulate CNTs suspended in liquid mediums. This article begins with a brief overview of CNT structure and production, with the emphasize on their electrical properties and response to electric fields. The DEP phenomenon as a CNT alignment method is demonstrated and graphically discussed, along with its theory, procedure, and parameters. We also discussed the side forces that arise in DEP systems and how they negatively or positively affect the CNT alignment. The article concludes with a brief review of CNT-based devices fabricated using DEP, as well as the method’s limitations and future prospects. 

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Section: Sensor Devicesmentioning

confidence: 99%

Dielectrophoretic alignment of carbon nanotubes: theory, applications, and future

2023

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“…Fujioka et al made use of DEP to separate semiconducting SWNTs from commercial CNT mixtures and then further enriched them by using a spin column and dextran-based gel for SWNT-based sensor fabrication [13]. The sensor fabricated using separated semiconducting SWNTs was more sensitive against nitrogen dioxide (NO 2 ) gas by two times than that fabricated using the pristine SWNTs mixture.…”

Section: Detection Of Other Gasesmentioning

confidence: 99%

Progress in Dielectrophoretic Assembly of Carbon Nanotubes for Sensing Application

Zhang

2016

MATEC Web Conf.

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Abstract. Carbon nanotubes (CNTs) have shown their potential for broad applications in field effect transistor, field emission, interconnects, energy storage, biomedicine, and many others, due to their excellent electrical, thermal, and mechanical properties. One requirement for many of these applications is to assemble CNTs into designated devices. As a promising nanomanipulation method, dielectrophoresis (DEP) has been widely applied to assemble CNTs in the fabrication of CNT-based nanodevices. This paper presents a brief review of the progress in CNT-based nanosensors and the application of DEP in device making. These sensors focus on the sensing of gases, temperature, bioparticles, light, pressure, stress, and strain.

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“…Researchers have succeeded to implement nanotechnology sensors that sense one parameter such as temperature, gas, or pressure [3], [4]. There is a need, however, to have multiple sensors on a chip that can detect a combination of parameters simultaneously to perform multiple bio functions.…”

Section: B Nanosensor Devicesmentioning

confidence: 99%

Integrated Sensor Wireless System for Alternative Energy Applications

Rizkalla¹,

El-Sharkawy²,

Sun³

2015

JOCET

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Abstract-These Wind turbines convert mechanical energy into electrical energy for storage and consumption. Pressure transducers are important in reflecting pressures within the hydraulic cylinders; they can provide continuous and reliable operation that enhances the reliability and efficiency of the overall system. Monitoring high temperature fluctuation will be necessary for the resolution and efficiency of the system. An integrated sensor system should be important for monitoring the tower vibration for bending, crack formation, and wave vibration.Smart nanotechnology materials have been recently utilized in sensing applications. Carbon nanotube (CNT) based SoC sensor systems have potential applications in various fields, including medical, energy, consumer electronics, computers, and HVAC (heating, ventilation, and air conditioning), among others.In this study, a nanotechnology multisensory system was designed and simulated using Labview Software. More emphasis are given to both pressure and temperature sensors that serve as transducers for the power mills. The mathematical models were developed for sensing three physical quantities: temperature, gas, and pressure. Four CNT groups on a chip (two for gas sensor, one for temperature, and a 4 th one for pressure) were utilized in order to perform sensing multiple parameters. The proposed fabrication processes and the materials used were chosen to avoid the interference of these parameters on each other when detecting one of them. The simulation results were translated into analog voltage from Labview software, transmitted via Bluetooth network, and received on desktop computers within the vicinity of the sensor system. The mathematical models and simulation results showed as high as 95% accuracy in measuring temperature, and the 5% error was caused from the interference of the surrounding gas. Within 7% change in pressure was impacted by both temperature and gas interference.Index Terms-Wind energy, nanotechnology, pressure sensors, temperature sensors, SOC.

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Separation and enrichment of semiconducting carbon nanotubes and its application to highly sensitive carbon nanotube gas sensor

Cited by 5 publications

References 8 publications

Dielectrophoretic alignment of carbon nanotubes: theory, applications, and future

Dielectrophoretic alignment of carbon nanotubes: theory, applications, and future

Progress in Dielectrophoretic Assembly of Carbon Nanotubes for Sensing Application

Integrated Sensor Wireless System for Alternative Energy Applications

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