Piezoresistivity of AG NWS-PDMS nanocomposite

Pichitpajongkit, Aekachan; Ryu, Seunghwa; Park, Inkyu

doi:10.1109/memsys.2014.6765758

Cited by 11 publications

(15 citation statements)

References 17 publications

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“…[ 10,29,54,61,63,75,90 ] We investigated the strain sensing mechanism of AgNWs-PDMS nanocomposites. [ 10,64 ] AgNWs with tensile strength of 0.92%-1.64% and Young's modulus of 81-176 GPa were embedded on a much softer PDMS layer with Young's modulus of 0.4-3.5 MPa. [ 10,83,101,102 ] Under stretching cycle, AgNW fi llers slid inside the PDMS matrix due to much larger elongation of the PDMS matrix.…”

Section: Disconnection Mechanismmentioning

confidence: 99%

“…[ 10,14,42,54,67,76 ] We conducted a comprehensive numerical simulation on the piezoresistivity of the AgNWs-PDMS nanocomposite based stretchable strain sensors. [ 10,64 ] AgNWs were randomly assigned into the PDMS matrix to construct the 3D network model. The position and orientation of each NW were calculated by using space coordinate system.…”

Section: Computational Analysismentioning

confidence: 99%

“…Moreover, more NW-NW junctions contributed into the piezoresistive effect for short NW networks, resulting in higher sensitivity. [ 64 ] The simulation of strain-responsive mechanism for stretchable strain sensors made of the overlapped graphene fl akes coated on polymer layers was also reported. [ 54,76,104 ] The percolation network of the randomly orientated circular graphene fl akes with uniform size distribution was analyzed.…”

Section: Computational Analysismentioning

confidence: 99%

“…[ 10 ] This approach has several advantages over the vision-based activity recognition (motion detection by set of cameras and image processing) in terms of mobility, space requirement, cost, and resolution. [ 64,[129][130][131] …”

Section: Virtual Reality and Entertainment Technologymentioning

confidence: 99%

“…[ 14,55,56,76,82 ] We have recently reported highly stretchable and sensitive strain sensors based on the silver nanowires (AgNWs)-elastomer nanocomposites. [ 10,64 ] The AgNW network thin fi lms were fi rst coated on a donor substrate and then were transferred to the PDMS matrix by fi ltration technique ( Figure 2 a). [ 10,83,84 ] The robust nanocomposites of AgNW fi llers and PDMS matrix with different network densities were then tested for strain sensing.…”

Section: Introductionmentioning

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

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2,641

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: Disconnection Mechanismmentioning

confidence: 99%

Section: Computational Analysismentioning

confidence: 99%

Section: Computational Analysismentioning

confidence: 99%

Section: Virtual Reality and Entertainment Technologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Amjadi

Kyung

Park

et al. 2016

Adv Funct Materials

Self Cite

2,641

2,129

View full text Add to dashboard Cite

show abstract

Manufacturing and characterizing of CCTO/SEBS dielectric elastomer as capacitive strain sensors

Zhang

Wang

et al. 2019

Rare Met.

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Wearable and Transparent Capacitive Strain Sensor with High Sensitivity Based on Patterned Ag Nanowire Networks

Kim

Park

2017

ACS Appl. Mater. Interfaces

177

123

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In this study, a transparent and stretchable thin-film capacitive strain sensor based on patterned Ag nanowire networks (AgNWs) was successfully fabricated. The AgNWs were patterned using a capillary force lithography (CFL) method and were embedded onto the surface of the polydimethylsiloxane substrate. The strain (ε) sensitivity of the capacitive strain sensor was controlled and enhanced by patterning the AgNWs into electrodes with an interdigitated shape. The interdigitated capacitive strain sensor (ICSS) is expected to have -1.57 gauge factor (GF) at 30% ε by calculation, which is much higher than the sensitivity of typical parallel-plate-type capacitive strain sensors. Because of the interdigitated pattern of the electrodes, the GF of the ICSS was increased up to -2.0. The ICSS had no hysteresis behavior up to ε values of 15% and showed stable ε sensing performance during the repeated stretching test at ε values of 10% for 1000 cycles. Furthermore, there was no cross talk between ε and pressure sensing in the AgNW-based ICSS, which was found to be insensitive to externally applied pressure. The ICSS was then used to detect the finger and wrist muscle motions of the human body to simulate its application to large and small ε sensing.

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Piezoresistivity of AG NWS-PDMS nanocomposite

Cited by 11 publications

References 17 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

Manufacturing and characterizing of CCTO/SEBS dielectric elastomer as capacitive strain sensors

Wearable and Transparent Capacitive Strain Sensor with High Sensitivity Based on Patterned Ag Nanowire Networks

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