Ultrasensitive Cracking-Assisted Strain Sensors Based on Silver Nanowires/Graphene Hybrid Particles

Chen, Song; Wei, Yong; Wei, Siman; Lin, Yong; Liu, Lan

doi:10.1021/acsami.6b09188

Cited by 240 publications

(190 citation statements)

References 44 publications

Supporting

Mentioning

179

Contrasting

Order By: Relevance

“…If the AgNWs were not interconnected, the sensors would not transmit signal any more. [27][28][29][30][31] Thus, an ideal flexible strain sensor should not only retain high flexibility, but also could be rapidly healed after mechanical damage. [32][33][34][35] Self-healing polymers with the capability to repair internal cracks or external fractures by themselves have been developed over the past decades.…”

Section: Introductionmentioning

confidence: 99%

Flexible Sandwich Structural Strain Sensor Based on Silver Nanowires Decorated with Self‐Healing Substrate

Jiang

Wang

et al. 2019

Macro Materials & Eng

202

View full text Add to dashboard Cite

Flexible and stretchable conducting composites that can sense stress or strain are needed for several emerging fields including human motion detection and personalized health monitoring. Silver nanowires (AgNWs) have already been used as conductive networks. However, once a traditional polymer is broken, the conductive network is subsequently destroyed. Integrating high pressure sensitivity and repeatable self‐healing capability into flexible strain sensors represents new advances for high performance strain sensing. Herein, superflexible 3D architectures are fabricated by sandwiching a layer of AgNWs decorated self‐healing polymer between two layers of polydimethylsiloxane, which exhibit good stability, self‐healability, and stretchability. For better mechanical properties, the self‐healing polymer is reinforced with carbon fibers (CFs). The sensors based on self‐healing polymer and AgNWs conductive network show high conductivity and excellent ability to repair both mechanical and electrical damage. They can detect different human motions accurately such as bending and recovering of the forearm and shank, the changes of palm, fist, and fingers. The fracture tensile stress of the reinforced self‐healing polymer (9 wt% CFs) is increased to 10.3 MPa with the elongation at break of 8%. The stretch/release responses under static and dynamic loads of the sensor have a high sensitivity, large sensing range, excellent reliability, and remarkable stability.

show abstract

Section: Introductionmentioning

confidence: 99%

Flexible Sandwich Structural Strain Sensor Based on Silver Nanowires Decorated with Self‐Healing Substrate

Jiang

Wang

et al. 2019

Macro Materials & Eng

202

View full text Add to dashboard Cite

show abstract

“…

disease diagnostics, [14] human-machine interaction, [15][16][17] and smart robot prosthesis devices. [18] Recently, various wearable pressure sensors with excellent sensitivity, robust flexibility, and good reproducibility have been well developed from typical pressure-sensitive transistors [19][20][21][22] and have capacitive sensing, [23,24] piezoelectric monitoring, [25,26] triboelectric sensing, [27,28] and piezoresistive sensing mechanisms.

…”

mentioning

confidence: 99%

A Flexible Wearable Pressure Sensor with Bioinspired Microcrack and Interlocking for Full‐Range Human–Machine Interfacing

Guo

Zhong

et al. 2018

Small

184

132

View full text Add to dashboard Cite

Flexible wearable pressure sensors have drawn tremendous interest for various applications in wearable healthcare monitoring, disease diagnostics, and human–machine interaction. However, the limited sensing range (<10%), low sensing sensitivity at small strains, limited mechanical stability at high strains, and complicated fabrication process restrict the extensive applications of these sensors for ultrasensitive full‐range healthcare monitoring. Herein, a flexible wearable pressure sensor is presented with a hierarchically microstructured framework combining microcrack and interlocking, bioinspired by the crack‐shaped mechanosensory systems of spiders and the wing‐locking sensing systems of beetles. The sensor exhibits wide full‐range healthcare monitoring under strain deformations of 0.2–80%, fast response/recovery time (22 ms/20 ms), high sensitivity, the ultrasensitive loading sensing of a feather (25 mg), the potential to predict the health of patients with early‐stage Parkinson's disease with the imitated static tremor, and excellent reproducibility over 10 000 cycles. Meanwhile, the sensor can be assembled as smart artificial electronic skins (E‐skins) for simultaneously mapping the pressure distribution and shape of touching sensing. Furthermore, it can be attached onto the legs of a smart robot and coupled to a wireless transmitter for wirelessly monitoring human‐motion interactivities.

show abstract

“…[27,28] However, most of these devices have low stretchability (usually <200% strain) and poor recoverability, also stiff characteristic against seamless combination with body regions, leading to great difficulties for body adhesion. [29,30] It is well known that hydrogel is a bioorigin flexible material, which consists of a great deal of water and 3D chemically or physically linked polymer networks. [31,32] In addition, hydrogels possess excellent bio-permeability and can be decorated with functional bio-macromolecules, further improving the combination of hydrogel and human physiological environment.…”

Section: Introductionmentioning

confidence: 99%

Highly Stretchable, Transparent, and Bio‐Friendly Strain Sensor Based on Self‐Recovery Ionic‐Covalent Hydrogels for Human Motion Monitoring

Sun

Zhou

et al. 2019

Macro Materials & Eng

View full text Add to dashboard Cite

Stretchable, flexible, and strain‐sensitive hydrogels have gained tremendous attention due to their potential application in health monitoring devices and artificial intelligence. Nevertheless, it is still a huge challenge to develop an integrated strain sensor with excellent mechanical properties, broad sensing range, high transparency, biocompatibility, and self‐recovery. Herein, a simple paradigm of stretchable strain sensor based on multifunctional hydrogels is prepared by constructing synergistic effects among polyacrylamide (PAM), biocompatible macromolecule sodium alginate (SA), and Ca ion in covalently and ionically crosslinked networks. Under large deformation, the dynamic SA‐Ca2+ bonds effectively dissipate energy, serving as sacrificial bonds, while the PAM chains bridge the crack and stabilize the network, endowing hydrogels with outstanding mechanical performances, for instance, high stretchability and compressibility, as well as excellent self‐recovery performance. The hydrogel is assembled to be a transparent and wearable strain sensor, which has good sensitivity and very wide sensing range (0–1700%), and can precisely detect dynamic strains, including both low and high strains (20–800% strain). It also exhibits fast response time (800 ms) and long‐time stability (200 cycles). The sensor can monitor and distinguish complicated human motions, opening up a new route for broad potential applications of eco‐friendly flexible strain‐sensing devices.

show abstract

Ultrasensitive Cracking-Assisted Strain Sensors Based on Silver Nanowires/Graphene Hybrid Particles

Cited by 240 publications

References 44 publications

Flexible Sandwich Structural Strain Sensor Based on Silver Nanowires Decorated with Self‐Healing Substrate

Flexible Sandwich Structural Strain Sensor Based on Silver Nanowires Decorated with Self‐Healing Substrate

A Flexible Wearable Pressure Sensor with Bioinspired Microcrack and Interlocking for Full‐Range Human–Machine Interfacing

Highly Stretchable, Transparent, and Bio‐Friendly Strain Sensor Based on Self‐Recovery Ionic‐Covalent Hydrogels for Human Motion Monitoring

Contact Info

Product

Resources

About