Piezoresistive Sensors: Full 3D Printing of Stretchable Piezoresistive Sensor with Hierarchical Porosity and Multimodulus Architecture (Adv. Funct. Mater. 11/2019)

Wang, Ziya; Guan, Xiao; Huang, Huayi; Wang, Haifei; Lin, Waner; Peng, Zhengchun

doi:10.1002/adfm.201970067

Cited by 31 publications

(43 citation statements)

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“…In contrast to conventional resistive‐type pressure sensors that rely on a multilevel microstructure to obtain conducting filler/counter electrode contact‐area‐dependent resistance, our device takes advantage of the reversible rearrangement and reconnection features of the embedded Cu networks. We obtained a minimum detection limit and sensitivity comparable to state‐of‐the‐art sensor devices (see Table S1 in the Supporting Information for comparison) . The use of embedded metal network TEs without additional counter electrodes or complex patterning technology to achieve a fully transparent, wearable, and sensitive pressure sensor opens up possible applications in future electronic skins.…”

Section: Resultsmentioning

confidence: 73%

Facile Fabrication of Ultraflexible Transparent Electrodes Using Embedded Copper Networks for Wearable Pressure Sensors

Zhao

et al. 2020

Adv Materials Technologies

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Considerable efforts have been made to explore flexible TEs in recent decades. Emerging candidates include conducting polymers, [6] carbon nanotubes, [7] graphene, [8] metal networks, [9][10][11][12] and hybrids of such materials. [13][14][15] Among these, metal networks are widely accepted to be the most promising candidate materials in terms of their high electrical conductivity and mechanical flexibility. Metal networks can be prepared by depositing metals on sacrificial network templates, such as crack networks [9,13] and electrospun fiber meshes. [16,17] Physical vapor deposition methods, including evaporation and sputtering, are most widely used to deposit metals onto these templates. [18][19][20][21] For example, Kulkarni's group has demonstrated a high-performance flexible capacitive touch panel made of thermalevaporated Cu networks. [21] Recently, solution-grown metal network TEs have drawn attention owing to their low cost and scalability. [12,[22][23][24][25][26][27][28] Despite that the crack network templates have the advantages of easy preparation and absence of junctions, there are currently a few simple solution-based processing approaches for fabricating metallic cracking network TEs with low sheet resistance and high visible transparency. The main difficulty lies in the fact that the crack templates are usually water soluble and easily peel off from the supporting substrates, which damaged the crack template and consequently considerably reduced the transmittance since the plating precursor solution tends to dissolve away or permeate the template. On the other hand, a few efforts have devoted to studying the variation of electrical properties of metal networks fabricated by crack template under large mechanical deformation.Here, we have developed a practical strategy for fabricating solution-processed Cu crack network TEs by oxygen plasma treatment-assisted crack template and electroplating (Scheme 1). The critical step that distinguishes this process from normal electroplating deposition is the surface modification of the conducting ITO glass by a simple and broadly applicable oxygen plasma treatment. The crack network templates and Cu wires formed without this treatment exhibited nonuniform and broaden morphologies. In contrast, this treatment resulted in narrow crack templates with good adhesion to the ITO glass, Pressure sensors are in urgent need due to the explosive demands in electronic skins. However, current resistive-type pressure sensors require electrode materials with complex multilevel microstructures or low opacity. Herein, a Cu network transparent electrode (TE) embedded in the polydimethylsiloxane (PDMS) substrate is designed to realize wearable pressure sensor. The Cu network is fabricated by oxygen plasma treatmentassisted crack template and electroplating. The oxygen plasma treatment improves the surface adhesion force of the substrate, which suppresses uneven template cracking and prevents the electroplating solution from seeping under the templates, thereby resulting in 20 ...

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Section: Resultsmentioning

confidence: 73%

Facile Fabrication of Ultraflexible Transparent Electrodes Using Embedded Copper Networks for Wearable Pressure Sensors

Zhao

et al. 2020

Adv Materials Technologies

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“…The piezoresistive tactile sensors have the advantages of simple structure, easy fabrication, low cost, high sensitivity [30,31] , and large measurement range, while there are also several drawbacks, such as obvious hysteresis effect, poor long-term stability, and requirement for external power supply, which are worthy of further investigating. The piezoresistive materials commonly used in piezoresistive tactile sensors include monocrystalline silicon [32] , carbon nanotubes [29,[33][34][35] , carbon black [36] , graphene [37,38] , MoS 2 [39] , and conductive polymers [40,41] .…”

Section: Sensing Mechanismsmentioning

confidence: 99%

Recent progress in flexible tactile sensor systems: from design to application

Zhu¹,

Zhou²,

Zhang³

2021

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With the rapid development of artificial intelligence, human-machine interaction, and healthcare systems, flexible tactile sensors have huge market potentials and research needs, so that both fundamental research and application demonstrations are evolving rapidly to push the potential to reality. In this review, we briefly summarize the recent progress of the flexible tactile sensor system, including the common sensing mechanisms, the important performance evaluation parameters, the device design trend, and the main applications. Moreover, the current device design trend towards flexible tactile sensor systems is discussed, including novel structures for outstanding performance, sensor arrays for large-area information acquisition, multi-mode information acquisition, and integration of tactile sensors with transistors. Various emerging applications enabled with these sensors are also exemplified in this review to show the potentials of the tactile sensors. Finally, we also discuss the technical demands and the future perspectives of flexible tactile sensor systems.

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“…Pressure sensors can convert an applied pressure into electronic signals [126,139] and they have great potential applications in physiological signal monitoring [140] and artificial intelligence [141–143] . The sensors can provide significant information about specific demands inside the human body itself as well as in processes involving human contact with an external environment [144] …”

Section: Self‐healing Sensorsmentioning

confidence: 99%

Recent Progress in Self‐healing Materials for Sensor Arrays

Choa

2020

ChemNanoMat

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The recent development of diverse types of self‐healing materials promises increased material lifetimes, reduced replacement costs, and improved product safety in a wide variety of practical engineering applications. In particular, self‐healing materials provide advantages in electronic devices, conductors and sensors, as evidenced by their possible applications such as electronic skin, protectively conductive coating, adhesives, energy storage devices, aerospace, automobile, etc. To further the development of self‐healing materials for sensors and conductors, this review provides a summary of the current work. A short overview of self‐healing concepts and classification are presented, and some of the strengths and weaknesses of each type of self‐healing material are introduced and highlighted, in relation to various sensor applications. A perspective on self‐healing material approaches and development strategies using soft electronic technology is provided.

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Piezoresistive Sensors: Full 3D Printing of Stretchable Piezoresistive Sensor with Hierarchical Porosity and Multimodulus Architecture (Adv. Funct. Mater. 11/2019)

Cited by 31 publications

References 0 publications

Facile Fabrication of Ultraflexible Transparent Electrodes Using Embedded Copper Networks for Wearable Pressure Sensors

Facile Fabrication of Ultraflexible Transparent Electrodes Using Embedded Copper Networks for Wearable Pressure Sensors

Recent progress in flexible tactile sensor systems: from design to application

Recent Progress in Self‐healing Materials for Sensor Arrays

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