Flexible Tactile Electronic Skin Sensor with 3D Force Detection Based on Porous CNTs/PDMS Nanocomposites

Sun, Xiaofeng; Sun, Jian; Li, Tong; Zheng, Shijian; Wang, Chunkai; Tan, Wenshuo; Zhang, Jingong; Liu, Chang; Ma, Tianjun; Qi, Zhi‐mei; Liu, Chunxiu; Xue, Ning

doi:10.1007/s40820-019-0288-7

Cited by 160 publications

(112 citation statements)

References 55 publications

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“…Multiple flexible or stretchable sensors have been developed by Micro-electro-mechanical system (MEMS) micromachining techniques for different purposes. For instance, strain sensors [13][14][15] can detect body motion, tactile sensors [16][17][18][19][20][21][22] enable to monitor three-axis handling/manipulation of objects, while proximity sensors 20,21,23,24 avoid any possible accident of humans and robots to unknown obstacles. Among them, proximity sensors are extremely appealing candidates for nondestructive realizing of collision prevention in industry.…”

mentioning

confidence: 99%

Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries

Moheimani

Aliahmad

Aliheidari

et al. 2021

Sci Rep

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Wearable sensing platforms have been rapidly advanced over recent years, thanks to numerous achievements in a variety of sensor fabrication techniques. However, the development of a flexible proximity sensor that can perform in a large range of object mobility remains a challenge. Here, a polymer-based sensor that utilizes a nanostructure composite as the sensing element has been presented for forthcoming usage in healthcare and automotive applications. Thermoplastic Polyurethane (TPU)/Carbon Nanotubes (CNTs) composites are capable of detecting presence of an external object in a wide range of distance. The proximity sensor exhibits an unprecedented detection distance of 120 mm with a resolution of 0.3%/mm. The architecture and manufacturing procedures of TPU/CNTs sensor are straightforward and performance of the proximity sensor shows robustness to reproducibility as well as excellent electrical and mechanical flexibility under different bending radii and over hundreds of bending cycles with variation of 4.7% and 4.2%, respectively. Tunneling and fringing effects are addressed as the sensing mechanism to explain significant capacitance changes. Percolation threshold analysis of different TPU/CNT contents indicated that nanocomposites having 2 wt% carbon nanotubes are exhibiting excellent sensing capabilities to achieve maximum detection accuracy and least noise among others. Fringing capacitance effect of the structure has been systematically analyzed by ANSYS Maxwell (Ansoft) simulation, as the experiments precisely supports the sensitivity trend in simulation. Our results introduce a new mainstream platform to realize an ultrasensitive perception of objects, presenting a promising prototype for application in wearable proximity sensors for motion analysis and artificial electronic skin.

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confidence: 99%

Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries

Moheimani

Aliahmad

Aliheidari

et al. 2021

Sci Rep

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“…The FTEs play a significant role in determining the performances (efficiency, flexibility, and stability) of these flexible photovoltaics including OSCs, perovskite solar cells (PVSCs), organic light‐emitting devices (OLEDs), and self‐powered flexible sensors. [ 24–34 ] Promising FTEs have been extensively investigated, such as metal nanowires (NWs), [ 13,14,18 ] metal grids, [ 35,36 ] metal meshes, [ 37,38 ] graphene, [ 3,39 ] poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), [ 40,41 ] and Mxene [ 42–44 ] have attracted tremendous attentions. Although many encouraging preliminary results have been achieved, each of the conducting materials suffers from one or more drawbacks including low flexibility, weak adhesion, moderate conductivity, unsatisfactory transparency, high surface roughness, poor wettability, and stability concerns, which indeed hamper the developments of the ITO‐free flexible OSCs.…”

Section: Introductionmentioning

confidence: 99%

Doping and Design of Flexible Transparent Electrodes for High‐Performance Flexible Organic Solar Cells: Recent Advances and Perspectives

Fan

2020

Adv Funct Materials

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Substantial effort has been devoted to both chemical doping and design of flexible transparent electrodes (FTEs) for flexible organic solar cells (OSCs) in the past decade. Poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate), graphene, metal nanostructures, metal oxide/ultrathin metal/metal oxide, Mxene, and their hybrid electrodes emerge to be the most promising flexible conducting materials over indium tin oxide. The FTE fabrications play a critical role in flexible OSCs. This feature review article summarizes the current status on the researches of the FTEs including various approaches and strategies to boost the conductivity, work function, mechanical flexibility, wettability, etc, which directly affect the performances of the flexible OSCs. The most cutting edge progresses on both FTEs and flexible OSCs are highlighted along the line. Advantages and plausible issues are pointed out. Perspectives are provided that can advance the developments of the flexible OSCs. This review raises the awareness for the importance of developing plenty of FTEs and reveals their critical role in flexible OSCs.

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“…Exciting achievements have been made in the electronics industry in the last two decades, which is mainly based on conductive, semiconducting, and dielectric materials with micro-/nanoengineering procedures. [67][68][69][70][71][72][73] For instance, carbon nanotubes (CNTs) are widely employed in microelectronics [74][75][76] and energy storage [77][78] fields for their superior mechanical strength and excellent electric properties. [79][80][81] Zinc oxide (ZnO) with a wide band gap (3.37 eV) as well as distinct electrical, catalytic, and optical properties plays a vital role in sensing, [82] energy storage, [83] dielectric properties, [84,85] photodetecting, [86] etc.…”

Section: Materials Of Flexible Electronicsmentioning

confidence: 99%

The Evolution of Flexible Electronics: From Nature, Beyond Nature, and To Nature

et al. 2020

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The flourishing development of multifunctional flexible electronics cannot leave the beneficial role of nature, which provides continuous inspiration in their material, structural, and functional designs. During the evolution of flexible electronics, some originated from nature, some were even beyond nature, and others were implantable or biodegradable eventually to nature. Therefore, the relationship between flexible electronics and nature is undoubtedly vital since harmony between nature and technology evolution would promote the sustainable development. Herein, materials selection and functionality design for flexible electronics that are mostly inspired from nature are first introduced with certain functionality even beyond nature. Then, frontier advances on flexible electronics including the main individual components (i.e., energy (the power source) and the sensor (the electric load)) are presented from nature, beyond nature, and to nature with the aim of enlightening the harmonious relationship between the modern electronics technology and nature. Finally, critical issues in next-generation flexible electronics are discussed to provide possible solutions and new insights in prospective exploration directions.

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Flexible Tactile Electronic Skin Sensor with 3D Force Detection Based on Porous CNTs/PDMS Nanocomposites

Abstract: HIGHLIGHTS • Flexible sensitive carbon nanotubes/polydimethylsiloxane (CNTs/PDMS) nanocomposite with novel double-side rough porous structure was proposed by simple manufacturing methods.

Cited by 160 publications

References 55 publications

Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries

Thermoplastic polyurethane flexible capacitive proximity sensor reinforced by CNTs for applications in the creative industries

Doping and Design of Flexible Transparent Electrodes for High‐Performance Flexible Organic Solar Cells: Recent Advances and Perspectives

The Evolution of Flexible Electronics: From Nature, Beyond Nature, and To Nature

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