Sorting single-walled carbon nanotubes by strain-based electrical burn-off

Zheng, Fuzhong; Zhou, Zhaoying; Yang, Xing; Yong, Tang; Wu, Ying

doi:10.1016/j.carbon.2010.02.013

Cited by 12 publications

(8 citation statements)

References 20 publications

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“…In addition, the large CNT contact area prevents charge-induced contact deterioration. Sensors fabricated by conventional CNT dispersal have few contact points and large current concentrations, which can result in damage from localized heating [3]. In contrast, MWCNT sheets have a large contact area, leading to less localized heating and better long term resistance durability.…”

Section: Resultsmentioning

confidence: 99%

“…Considerable research has been performed in order to incorporate this versatile material into many fields, such as sensors and actuators. Several groups have demonstrated the excellent piezoresistive properties of individual CNTs [1]- [3]. However, these studies have generally involved the measurement of the conductivity of individual CNTs under strain using an AFM tip or micro-electro-mechanical-system (MEMS).…”

Section: Introductionmentioning

confidence: 99%

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A high sensitive strain sensor using a multi-walled carbon nanotube sheet

Jung

Lee

Overzet

et al. 2012

2012 12th IEEE International Conference on Nanotechnology (IEEE-NANO)

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A multi-walled carbon nanotube (MWCNT) sheet-based strain sensor is presented in this paper, which possesses a novel fabrication technique that employs a simpler process than that of dispersing CNTs into a liquid or polymer.The sheets were spun from a MWCNT forest grown on a silicon substrate. The electrical resistance of the MWCNT sheets increased linearly with an increased tensile strain. The sheet did not require any chemical grafting or charging in order to work as a sensor, making it an ideal strain sensor. The proposed sensor exhibited excellent piezoresistive behavior under repetitive strain and relaxation, as well as a relatively high sensitivity compared to other methods, highlighting its potential application to high sensitivity pressure and force sensors.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A high sensitive strain sensor using a multi-walled carbon nanotube sheet

Jung

Lee

Overzet

et al. 2012

2012 12th IEEE International Conference on Nanotechnology (IEEE-NANO)

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show abstract

“…Moreover, the large CNT contact area prevented chargeinduced contact damage. Sensors fabricated by conventional CNT dispersal or spin-coating have fewer contact points and large current concentrations, which can result in deterioration due to localized heating [22]. In contrast, our MWCNT sheets had a large contact area, leading to less localized heating and improved long-term resistance stability.…”

Section: Reproducibility and Stabilitymentioning

confidence: 98%

Strain-Sensing Characteristics of Multi-Walled Carbon Nanotube Sheet

Jung¹,

Lee²

2013

Journal of Sensor Science and Technology

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In this paper, the properties of strain sensors made of spin-capable multi-walled carbon nanotubes (MWCNTs) were characterized and their sensing mechanisms analyzed. The key contribution of this paper is a new fabrication technique that introduces a simpler transfer method compared to spin-coating or dispersion CNT. Resistance of the MWCNT sheet strain sensor increased linearly with higher strain. To investigate the effect of CNT concentration on sensitivity, two strain sensors with different layer numbers of MWCNT sheets (one and three layers) were fabricated. According to the results, the sensor with a three-layer sheet showed higher sensitivity than that with one layer. In addition, experiments were conducted to examine the effects of environmental factors, temperature, and gas on sensor sensitivity. An increase in temperature resulted in a reduction in sensor sensitivity. It was also observed that ambient gas influenced the properties of the MWCNT sheet due to charge transfer. Experimental results showed that there was a linear change in resistance in response to strain, and the resistance of the sensor fully recovered to its unstressed state and exhibited stable electromechanical properties.

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“…The optimum condition for deposition was found for

\frac{ε_{p}}{ε_{m}}

= 100 considering other parameters such as frequency, electrode space, and applied potential difference are constant. The self‐assembly and alignment of CNTs using DEP can be used on a laboratory scale to fabricate a large number of devices with identical SWNT sources, thereby, allowing statistical studies such as on SWNT piezoelectricity or sensing applications [203,204].…”

Section: Swnt Dep Applicationsmentioning

confidence: 99%

Carbon nanotube dielectrophoresis: Theory and applications

2020

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Carbon nanotubes (CNTs) are one of the most extensively studied nanomaterials in the 21st century. Since their discovery in 1991, many studies have been reported advancing our knowledge in terms of their structure, properties, synthesis, and applications. CNTs exhibit unique electrothermal and conductive properties which, combined with their mechanical strength, have led to tremendous attention of CNTs as a nanoscale material in the past two decades. To introduce the various types of CNTs, we first provide basic information on their structure followed by some intriguing properties and a brief overview of synthesis methods. Although impressive advances have been demonstrated with CNTs, critical applications require purification, positioning, and separation to yield desired properties and functional elements. Here, we review a versatile technique to manipulate CNTs based on their dielectric properties, namely dielectrophoresis (DEP). A detailed discussion on the DEP aspects of CNTs including the theory and various technical microfluidic realizations is provided. Various advancements in DEP‐based manipulations of single‐walled and multiwalled CNTs are also discussed with special emphasis on applications involving separation, purification, sensing, and nanofabrication.

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Sorting single-walled carbon nanotubes by strain-based electrical burn-off

Cited by 12 publications

References 20 publications

A high sensitive strain sensor using a multi-walled carbon nanotube sheet

A high sensitive strain sensor using a multi-walled carbon nanotube sheet

Strain-Sensing Characteristics of Multi-Walled Carbon Nanotube Sheet

Carbon nanotube dielectrophoresis: Theory and applications

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