Multi-wall carbon nanotubes coated with polyaniline

Konyushenko, Elena N.; Stejskal, Jaroslav; Trchová, Miroslava; Hradil, J.; Kovářová, Jana; Prokeš, Ján; Cieslar, Miroslav; Hwang, Jeong-Yuan; Chen, Kuei‐Hsien; Sapurina, Irina

doi:10.1016/j.polymer.2006.05.059

Cited by 289 publications

(206 citation statements)

References 68 publications

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“…CNTs have previously been combined with both bulk and nano PAni to improve its properties for a range of applications, including actuation and sensing [4,6,[30][31][32][33][34][35][36][37][38][39][40]. For example, Spinks et al report using CNTs to improve the tensile strength and stress loading of PAni for artificial muscles [6].…”

Section: Introductionmentioning

confidence: 99%

Increased response/recovery lifetimes and reinforcement of polyaniline nanofiber films using carbon nanotubes

Blighe

Diamond

Coleman

et al. 2012

Carbon

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Section: Introductionmentioning

confidence: 99%

Increased response/recovery lifetimes and reinforcement of polyaniline nanofiber films using carbon nanotubes

Blighe

Diamond

Coleman

et al. 2012

Carbon

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“…After polymerization of MWCNTs with PANI, additional peaks that are characteristic of protonated PANI appear at 1170 and 1504 cm − 1 . 25,26 The fabricated sensor array is conformally integrated on the skin and is mechanically stable under stretching as well as bending and twisting deformations ( Figure 1c). Figure 1d shows the fabrication of the four layers.…”

Section: Resultsmentioning

confidence: 99%

“…12 The temperature sensor exhibits response and relaxation times of 300 ms and 1.2 s, respectively, for a temperature difference of 5°C, which are better than those of previously reported temperature sensors (Figure 3d). 10,26 The short response time is attributed to high thermal diffusivity and low heat capacity owing to the use of the MWCNT-PANI composite. 35 The fabrication of self-powered MF sensing devices is a challenge in the development of sustainable flexible sensors.…”

Section: Resultsmentioning

confidence: 99%

Polyurethane foam coated with a multi-walled carbon nanotube/polyaniline nanocomposite for a skin-like stretchable array of multi-functional sensors

Hong

Park

et al. 2017

NPG Asia Mater

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Body-attachable sensors can be applied to electronic skin (e-skin) as well as safety forewarning and health monitoring systems. However, achieving facile fabrication of high-performance, cost-effective sensors with mechanical stability in response to deformation due to body movement is challenging. Herein we report the material design, fabrication and characteristics of a skin-like stretchable array of multi-functional (MF) sensors based on a single sensing material of polyurethane foam coated with multi-walled carbon nanotube/polyaniline nanocomposite, which enables simultaneous detection of body temperature, wrist pulse and ammonia gas. These sensors exhibit high sensitivity, fast response and excellent durability. Furthermore, the fabricated sensor array shows stable performance under biaxial stretching up to 50% and attachment to skin owing to the use of directprinted Galinstan liquid metal interconnections. This work proposes a facile method for fabrication of high-performance, stretchable MF sensors via appropriate selection of sensor design and functional materials that are applicable to e-skin and health monitoring systems. NPG Asia Materials (2017) 9, e448; doi:10.1038/am.2017.194; published online 17 November 2017 INTRODUCTIONWearable electronics have attracted considerable attention for use in electronic skin (e-skin) and health monitoring systems in order for a comfortable and secure life. 1-5 e-Skin is a human interactive device that can simultaneously sense signals from the body and respond to the environment. Thus it should be capable of measuring the five types of senses (taste, sight, hearing, olfactory and touch sensation) with high sensitivity and show mechanical stability against deformation due to skin movement. As a result, e-skin is required to be very thin and have a strain-relaxed design. 6 Because of the increasing importance of e-skin, extensive efforts have been undertaken to develop various sensors with high sensitivity. 7 Beyond the conventional sensor that can detect a single stimulus, novel advanced sensors for simultaneous monitoring of multiple stimuli (multi-functional (MF) sensors) have been actively investigated. 8,9 For practical application of such MF sensors, it is necessary to eliminate the interference between different stimuli that is commonly observed in conventional MF sensors, 10 in addition to fabricating cost-effective sensors on a deformable substrate. Development of MF sensors that transduce different stimuli into separate signals can intrinsically minimize signal interference, thus allowing for sensitive detection of multiple parameters, such as temperature and pressure, in a single device without decoupling analysis. Many power-

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“…Other groups have seen improved conductivity of similar CNT networks by wrapping CNTs in certain polymers in aqueous suspension 20 , 21 . These groups found that hydrophobic polymers such as polyaniline, polyvinyl pyrrolidone (PVP) and polystyrene sulfonate will spontaneously wrap themselves around carbon nanotubes in order to minimize their energy when all are placed in water and heated.…”

Section: Polymer Wrappingmentioning

confidence: 99%

Nano Electronic Materials

2017

Jpn. J. Appl. Phys.

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This thesis explores fabrication methods and characterization of novel materials used in field effect transistors, including metallic nanowires, carbon nanotubes, and graphene.Networks of conductive nanotubes are promising candidates for thin film electrode alternatives due to their desirable transparency, flexibility, and potential for large-scale processing. Silver nanowire and carbon nanotube networks are evaluated for their use as thin film electrode alternatives. Growth of silver nanowires in porous alumina membranes, dispersion onto a variety of substrates, and patterning is described. Metallic carbon nanotubes are suspended in aqueous solutions, airbrushed onto substrates, and patterned. The conductivity and transparency of both networks is evaluated against industry standards.Graphene is a two dimensional gapless semimetal that demonstrates outstanding room temperature mobilities, optical transparency, mechanical strength, and sustains large current densities, all desirable properties for semiconductors used in field effect transistors. Graphene's low on/off ratio and low throughput fabrication techniques have yet to be overcome before it becomes commercially viable.Silicon oxide substrates are common dielectrics in field effect transistors and instrumental in locating mechanically exfoliated graphene. The morphology of two different silicon oxides have been studied statistically with atomic force microscopy and scaling analysis. Tailoring the physical properties of these substrates may provide a control of graphene's electrical properties.A silicon oxide substrate may also be chemically altered to control the properties of graphene. I have modified silicon oxide with self-assembled monolayers with various terminal groups to control the field near the graphene. I characterize the monolayers with atomic force microscopy, x-ray photospectroscopy, and contact angles. I characterize graphene on these substrates using Raman microscopy and transport measurements.Finally, I examine low frequency noise in graphene field effect transistors on conventional silicon oxide substrates. As devices become smaller, the signal to noise ratio of these devices becomes important. Low frequency noise occurs on long time scales and must be controlled for device stability. I measure novel behavior of low frequency noise in multiple graphene devices. The noise may be described electronhole puddles in the graphene that are caused by trapped charges near the surface of silicon oxide. NANOELECTRONIC MATERIALS

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Multi-wall carbon nanotubes coated with polyaniline

Cited by 289 publications

References 68 publications

Increased response/recovery lifetimes and reinforcement of polyaniline nanofiber films using carbon nanotubes

Increased response/recovery lifetimes and reinforcement of polyaniline nanofiber films using carbon nanotubes

Polyurethane foam coated with a multi-walled carbon nanotube/polyaniline nanocomposite for a skin-like stretchable array of multi-functional sensors

Nano Electronic Materials

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