Ultrasensitive strain sensors made from metal-coated carbon nanofiller/epoxy composites

Ning, Hui; Itoi, Takaomi; Akagi, Taro; Kojima, Takashi; Xue, Jun Min; Chen, Yan; Atobe, Satoshi; Fukunaga, H.; Yuan, Weifeng; Surina,; Liu, Yaolu; Alamusi,

doi:10.1016/j.carbon.2012.08.029

Cited by 110 publications

(90 citation statements)

References 26 publications

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“…For instance, metal-coated CNT-epoxy nanocomposites (GFs ≈ 155) (Figure 4 d) and CNTs-graphite fl ake hybrid thin fi lm coated on PET (GFs ≈ 7.8) showed high linearity and sensitivity, but with very low stretchability (ε ≤ 1.5%). [ 32,72,73,78,114 ] Capacitive-type sensors showed excellent linearity, but with low sensitivity ( Figure 5 c and Figure 6 ). [ 58,65 ] In overall, we found a trade-off relationship between "high sensitivity" and "high linearity and stretchability" in majority of strain sensors ( Figure 6 ).…”

Section: Linearitymentioning

confidence: 91%

“…Even in this case, the contribution of the piezoresistivity of nanomaterials on the total resistance-strain behavior of stretchable strain sensors may be expected to be low due to the large elastic mismatch as well as weak interfacial adhesion strength between nanomaterials and polymers, yielding negligible deformations of nanomaterials upon stretching. [ 10,32,34,42,90,100 ] …”

Section: Piezoresistive Effectmentioning

confidence: 99%

“…[ 10 ] CNTspolymer composites based strain sensors typically exhibited nonlinear electromechanical performance with low sensitivity. [ 32,42,48,49,59,71,[111][112][113] Both sensitivity and linearity of the CNTs-polymer composites were improved by their hybrid structures. For instance, metal-coated CNT-epoxy nanocomposites (GFs ≈ 155) (Figure 4 d) and CNTs-graphite fl ake hybrid thin fi lm coated on PET (GFs ≈ 7.8) showed high linearity and sensitivity, but with very low stretchability (ε ≤ 1.5%).…”

Section: Linearitymentioning

confidence: 99%

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Stretchable, Skin‐Mountable, and Wearable Strain Sensors and Their Potential Applications: A Review

Amjadi

Kyung

Park

et al. 2016

Adv Funct Materials

2,549

2,129

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wileyonlinelibrary.comSkin-mountable and wearable sensors can be attached onto the clothing or even directly mounted on the human skin for the real-time monitoring of human activities. [ 10 ] Besides their high effi ciency, they must fulfi ll several minimum requirements including high stretchability, fl exibility, durability, low power consumption, biocompatibility, and lightweight. These demands become even more severe for epidermal electronic devices where mechanical compliance like human skin and high stretchability ( ε > 100% where ε is the strain) are required. [ 11,12 ] Recently, several types of skin-mountable and wearable sensors have been proposed by using nanomaterials coupled with fl exible and stretchable polymers. Indeed, nanomaterials are utilized as functional sensing elements owing to their outstanding electrical, mechanical, optical, and chemical properties while polymers are employed as fl exible support materials thanks to their fl exibility, stretchability, humanfriendliness, and durability. [ 13 ] Examples of those innovative sensors include strain sensors, [ 10,[12][13][14] pressure sensors, [ 5,[15][16][17] electronic skins (e-skins), [ 3,[16][17][18][19][20] and temperature sensors. [ 2,21,22 ] Particularly, various skin-mountable and wearable strain sensors have been developed because of their broad applications in personalized heath-monitoring, human motion detection, human-machine interfaces, and soft robotics. [ 10,12,[23][24][25][26][27][28][29][30][31] This paper aims to survey fabrication processes, working mechanisms, strain sensing performances, and applications of stretchable strain sensors. The article is organized as follows: fi rst, common operation mechanisms of stretchable strain sensors are described. Here, we summarize novel functional nanomaterials and techniques for the fabrication of stretchable strain sensors in details. Second, mechanisms involved in the strain-responsive behavior of resistive-type and capacitive-type sensors are explained. We show that the infl uence of traditional mechanisms like geometrical changes and piezoresistivity of materials on the strain sensing performance of fl exible strain sensors are very small whereas mechanisms such as disconnection between sensing elements, crack propagation in thin fi lms, and tunneling effect can potentially be employed for highly stretchable and sensitive strain sensing. Third, we emphasize the performance parameters of stretchable strain sensors in terms of stretchability, sensitivity, linearity, hysteresis behavior, response time, overshooting, and durability. We demonstrate

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Section: Linearitymentioning

confidence: 91%

Section: Piezoresistive Effectmentioning

confidence: 99%

Section: Linearitymentioning

confidence: 99%

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Stretchable, Skin‐Mountable, and Wearable Strain Sensors and Their Potential Applications: A Review

Amjadi

Kyung

Park

et al. 2016

Adv Funct Materials

2,549

2,129

View full text Add to dashboard Cite

show abstract

“…However, up to now only a few studies about the stability and reproducibility of CNT strain sensors have been reported. There are some examples related to structural health monitoring [11,123–125]. For instance, Yamada et al [11] used SWCNT on PDMS to measure human motion by assembling the sensors on bandages or on clothes.…”

Section: Strain Sensors Based On Carbon Nanotube Thin Films and Cnt/pmentioning

confidence: 99%

Flexible Carbon Nanotube Films for High Performance Strain Sensors

Kanoun

Müller

Benchirouf

et al. 2014

Sensors

263

138

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Compared with traditional conductive fillers, carbon nanotubes (CNTs) have unique advantages, i.e., excellent mechanical properties, high electrical conductivity and thermal stability. Nanocomposites as piezoresistive films provide an interesting approach for the realization of large area strain sensors with high sensitivity and low manufacturing costs. A polymer-based nanocomposite with carbon nanomaterials as conductive filler can be deposited on a flexible substrate of choice and this leads to mechanically flexible layers. Such sensors allow the strain measurement for both integral measurement on a certain surface and local measurement at a certain position depending on the sensor geometry. Strain sensors based on carbon nanostructures can overcome several limitations of conventional strain sensors, e.g., sensitivity, adjustable measurement range and integral measurement on big surfaces. The novel technology allows realizing strain sensors which can be easily integrated even as buried layers in material systems. In this review paper, we discuss the dependence of strain sensitivity on different experimental parameters such as composition of the carbon nanomaterial/polymer layer, type of polymer, fabrication process and processing parameters. The insights about the relationship between film parameters and electromechanical properties can be used to improve the design and fabrication of CNT strain sensors.

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“…In particular, hard carbons are to be considered as the most promising candidates, due to the larger interlayer distance (higher than graphite) and disordered structure, which facilitates the insertion and extraction of sodium ions. [28,29,[49][50][51][52] However, increasing the degree of graphitization leads to a possible decay in the sodium ion storage capacity, which needs to be addressed suitably. Subsequent to the ever first report on the electrochemical insertion of sodium into hard carbon by Doeff et al, [53] and Dahn et al, [45] been explored for its ability to function as an efficient metal free catalyst for ORR.…”

Section: Why Hhc For Sibs and Orr Applications?mentioning

confidence: 99%

Dual hetero atom containing bio-carbon: Multifunctional electrode material for High Performance Sodium-ion Batteries and Oxygen Reduction Reaction

Saravanan

Mullaivananathan

Kalaiselvi

2015

Electrochimica Acta

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Ultrasensitive strain sensors made from metal-coated carbon nanofiller/epoxy composites

Cited by 110 publications

References 26 publications

Stretchable, Skin‐Mountable, and Wearable Strain Sensors and Their Potential Applications: A Review

Stretchable, Skin‐Mountable, and Wearable Strain Sensors and Their Potential Applications: A Review

Flexible Carbon Nanotube Films for High Performance Strain Sensors

Dual hetero atom containing bio-carbon: Multifunctional electrode material for High Performance Sodium-ion Batteries and Oxygen Reduction Reaction

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