Freezing-Tolerant, Highly Sensitive Strain and Pressure Sensors Assembled from Ionic Conductive Hydrogels with Dynamic Cross-Links

2020 ◽  
Vol 12 (22) ◽  
pp. 25334-25344 ◽  
Author(s):  
Hongyan Liu ◽  
Xing Wang ◽  
Yanxia Cao ◽  
Yanyu Yang ◽  
Yatian Yang ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Sensitive Strain ◽  
Highly Sensitive ◽  
Cross Links ◽  
Conductive Hydrogels

Fast self-healing multifunctional polyvinyl alcohol nano-organic composite hydrogel as building blocks for highly sensitive strain/pressure sensors

2021 ◽  
Author(s):  
Wenhao Zhao ◽  
Dongzhi Zhang ◽  
Yan Yang ◽  
Chen Du ◽  
Bao Zhang
Keyword(s):  
Polyvinyl Alcohol ◽  
Human Computer Interaction ◽  
Pressure Sensors ◽  
Building Blocks ◽  
Composite Hydrogel ◽  
Sensitive Strain ◽  
Self Healing ◽  
Wearable Sensor ◽  
Hybrid Hydrogel ◽  
Highly Sensitive

The conductive and biocompatible hybrid hydrogel was successfully assembled into an adhesive, flexible wearable sensor for ultra-sensitive human-computer interaction and smart detection, which holds excellent self-healing capability. This conductive, repairable...

scholarly journals Skin-like Transparent Polymer-Hydrogel Hybrid Pressure Sensor with Pyramid Microstructures

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3272
Author(s):  
Kyumin Kang ◽  
Hyunjin Jung ◽  
Soojung An ◽  
Hyoung Won Baac ◽  
Mikyung Shin ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Electronic Devices ◽  
Pressure Sensors ◽  
Polymer Hydrogel ◽  
Highly Sensitive ◽  
Critical Issues ◽  
Conductive Hydrogels ◽  
Living Tissues ◽  
Conformal Contact

Soft biomimetic electronic devices primarily comprise an electronic skin (e-skin) capable of implementing various wearable/implantable applications such as soft human–machine interfaces, epidermal healthcare systems, and neuroprosthetics owing to its high mechanical flexibility, tissue conformability, and multifunctionality. The conformal contact of the e-skin with living tissues enables more precise analyses of physiological signals, even in the long term, as compared to rigid electronic devices. In this regard, e-skin can be considered as a promising formfactor for developing highly sensitive and transparent pressure sensors. Specifically, to minimize the modulus mismatch at the biotic–abiotic interface, transparent-conductive hydrogels have been used as electrodes with exceptional pressing durability. However, critical issues such as dehydration and low compatibility with elastomers remain a challenge. In this paper, we propose a skin-like transparent polymer-hydrogel hybrid pressure sensor (HPS) with microstructures based on the polyacrylamide/sodium-alginate hydrogel and p-PVDF-HFP-DBP polymer. The encapsulated HPS achieves conformal contact with skin due to its intrinsically stretchable, highly transparent, widely sensitive, and anti-dehydrative properties. We believe that the HPS is a promising candidate for a robust transparent epidermal stretchable-skin device.

Superhydrophobic highly flexible doubly cross-linked aerogel/carbon nanotube composites as strain/pressure sensors

2020 ◽  
Vol 8 (22) ◽  
pp. 4883-4889 ◽  
Author(s):  
Guoqing Zu ◽  
Xiaodong Wang ◽  
Kazuyoshi Kanamori ◽  
Kazuki Nakanishi
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Pressure Sensors ◽  
Sensitive Strain ◽  
Pressure Sensing ◽  
Flexible Composites ◽  
Highly Sensitive ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

We report novel superhydrophobic highly flexible composites based on a doubly cross-linked aerogel and carbon nanotubes for highly sensitive strain/pressure sensing.

scholarly journals Development of Highly Sensitive Strain Sensor Using Area-Arrayed Graphene Nanoribbons

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1701
Author(s):  
Ken Suzuki ◽  
Ryohei Nakagawa ◽  
Qinqiang Zhang ◽  
Hideo Miura
Keyword(s):  
Graphene Nanoribbons ◽  
Strain Sensor ◽  
Strain Sensors ◽  
Sensitive Strain ◽  
Bending Test ◽  
Gauge Factor ◽  
Four Point Bending ◽  
Current Voltage ◽  
Highly Sensitive ◽  
Current Voltage Relationship

In this study, a basic design of area-arrayed graphene nanoribbon (GNR) strain sensors was proposed to realize the next generation of strain sensors. To fabricate the area-arrayed GNRs, a top-down approach was employed, in which GNRs were cut out from a large graphene sheet using an electron beam lithography technique. GNRs with widths of 400 nm, 300 nm, 200 nm, and 50 nm were fabricated, and their current-voltage characteristics were evaluated. The current values of GNRs with widths of 200 nm and above increased linearly with increasing applied voltage, indicating that these GNRs were metallic conductors and a good ohmic junction was formed between graphene and the electrode. There were two types of GNRs with a width of 50 nm, one with a linear current–voltage relationship and the other with a nonlinear one. We evaluated the strain sensitivity of the 50 nm GNR exhibiting metallic conduction by applying a four-point bending test, and found that the gauge factor of this GNR was about 50. Thus, GNRs with a width of about 50 nm can be used to realize a highly sensitive strain sensor.

Mechanism of highly sensitive strain response in antiferromagnetic chromium

2021 ◽  
Vol 129 (20) ◽  
pp. 203901
Author(s):  
Yohei Kota ◽  
Eiji Niwa ◽  
Masayuki Naoe
Keyword(s):  
Sensitive Strain ◽  
Strain Response ◽  
Highly Sensitive

Highly Sensitive and Patchable Pressure Sensors Mimicking Ion-Channel-Engaged Sensory Organs

ACS Nano ◽  
2016 ◽  
Vol 10 (4) ◽  
pp. 4550-4558 ◽  
Author(s):  
Kyoung-Yong Chun ◽  
Young Jun Son ◽  
Chang-Soo Han
Keyword(s):  
Ion Channel ◽  
Pressure Sensors ◽  
Sensory Organs ◽  
Highly Sensitive

scholarly journals Crack-induced Ag nanowire networks for transparent, stretchable, and highly sensitive strain sensors

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Chan-Jae Lee ◽  
Keum Hwan Park ◽  
Chul Jong Han ◽  
Min Suk Oh ◽  
Banseok You ◽  
...  
Keyword(s):  
Strain Sensors ◽  
Sensitive Strain ◽  
Highly Sensitive ◽  
Nanowire Networks ◽  
Ag Nanowire

Fabrication of highly sensitive capacitive pressure sensors with electrospun polymer nanofibers

2017 ◽  
Vol 111 (7) ◽  
pp. 073502 ◽  
Author(s):  
Yeongjun Kim ◽  
Shin Jang ◽  
Byung Ju Kang ◽  
Je Hoon Oh
Keyword(s):  
Pressure Sensors ◽  
Polymer Nanofibers ◽  
Highly Sensitive

Highly sensitive and stable flexible pressure sensors with micro-structured electrodes

2017 ◽  
Vol 699 ◽  
pp. 824-831 ◽  
Author(s):  
Yong Quan ◽  
Xiongbang Wei ◽  
Lun Xiao ◽  
Tao Wu ◽  
Hanying Pang ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Highly Sensitive ◽  
Flexible Pressure Sensors

scholarly journals Irreversible and Self-Healing Electrically Conductive Hydrogels Made of Bio-Based Polymers

2022 ◽  
Vol 23 (2) ◽  
pp. 842
Author(s):  
Ahmed Ali Nada ◽  
Anita Eckstein Andicsová ◽  
Jaroslav Mosnáček
Keyword(s):  
Renewable Resources ◽  
Mechanical Stability ◽  
Conductive Polymers ◽  
Special Focus ◽  
Self Healing ◽  
Natural Polymers ◽  
Electrically Conductive ◽  
Preparation Methods ◽  
Cross Links ◽  
Conductive Hydrogels

Electrically conductive materials that are fabricated based on natural polymers have seen significant interest in numerous applications, especially when advanced properties such as self-healing are introduced. In this article review, the hydrogels that are based on natural polymers containing electrically conductive medium were covered, while both irreversible and reversible cross-links are presented. Among the conductive media, a special focus was put on conductive polymers, such as polyaniline, polypyrrole, polyacetylene, and polythiophenes, which can be potentially synthesized from renewable resources. Preparation methods of the conductive irreversible hydrogels that are based on these conductive polymers were reported observing their electrical conductivity values by Siemens per centimeter (S/cm). Additionally, the self-healing systems that were already applied or applicable in electrically conductive hydrogels that are based on natural polymers were presented and classified based on non-covalent or covalent cross-links. The real-time healing, mechanical stability, and electrically conductive values were highlighted.

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