Ionic Flexible Sensors: Mechanisms, Materials, Structures, and Applications

2022 ◽  
pp. 2110417
Author(s):  
Chun Zhao ◽  
Yanjie Wang ◽  
Gangqiang Tang ◽  
Jie Ru ◽  
Zicai Zhu ◽  
...  
Keyword(s):  
Flexible Sensors

Flexible Sensors for NDI of Curved Surfaces on Turbofan Components

2018 ◽  
Author(s):  
Evan Weststrate ◽  
◽  
Michael S. Squillante ◽  
Sergey Chekanov
Keyword(s):  
Curved Surfaces ◽  
Flexible Sensors

scholarly journals A Knitted Sensing Glove for Human Hand Postures Pattern Recognition

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1364
Author(s):  
Seulah Lee ◽  
Yuna Choi ◽  
Minchang Sung ◽  
Jihyun Bae ◽  
Youngjin Choi
Keyword(s):  
Pattern Recognition ◽  
Confusion Matrix ◽  
Strain Sensors ◽  
Mixed Data ◽  
Human Hand ◽  
Flexible Sensors ◽  
Target Hand ◽  
The Cost ◽  
Grasp Posture ◽  
Conductive Yarn

In recent years, flexible sensors for data gloves have been developed that aim to achieve excellent wearability, but they are associated with difficulties due to the complicated manufacturing and embedding into the glove. This study proposes a knitted glove integrated with strain sensors for pattern recognition of hand postures. The proposed sensing glove is fabricated at all once by a knitting technique without sewing and bonding, which is composed of strain sensors knitted with conductive yarn and a glove body with non-conductive yarn. To verify the performance of the developed glove, electrical resistance variations were measured according to the flexed angle and speed. These data showed different values depending on the speed or angle of movements. We carried out experiments on hand postures pattern recognition for the practicability verification of the knitted sensing glove. For this purpose, 10 able-bodied subjects participated in the recognition experiments on 10 target hand postures. The average classification accuracy of 10 subjects reached 94.17% when their own data were used. The accuracy of up to 97.1% was achieved in the case of grasp posture among 10 target postures. When all mixed data from 10 subjects were utilized for pattern recognition, the average classification expressed by the confusion matrix arrived at 89.5%. Therefore, the comprehensive experimental results demonstrated the effectiveness of the knitted sensing gloves. In addition, it is expected to reduce the cost through a simple manufacturing process of the knitted sensing glove.

Super-elastic ferroelectric single-crystal membrane with continuous electric dipole rotation

Science ◽  
2019 ◽  
Vol 366 (6464) ◽  
pp. 475-479 ◽  
Author(s):  
Guohua Dong ◽  
Suzhi Li ◽  
Mouteng Yao ◽  
Ziyao Zhou ◽  
Yong-Qiang Zhang ◽  
...  
Keyword(s):  
Energy Landscape ◽  
Domain Engineering ◽  
Bending Test ◽  
Dynamic Evolution ◽  
Brittle Deformation ◽  
Continuous Transition ◽  
Flexible Sensors ◽  
Mismatch Stress ◽  
Ferroelectric Single Crystal

Ferroelectrics are usually inflexible oxides that undergo brittle deformation. We synthesized freestanding single-crystalline ferroelectric barium titanate (BaTiO3) membranes with a damage-free lifting-off process. Our BaTiO3 membranes can undergo a ~180° folding during an in situ bending test, demonstrating a super-elasticity and ultraflexibility. We found that the origin of the super-elasticity was from the dynamic evolution of ferroelectric nanodomains. High stresses modulate the energy landscape markedly and allow the dipoles to rotate continuously between the a and c nanodomains. A continuous transition zone is formed to accommodate the variant strain and avoid high mismatch stress that usually causes fracture. The phenomenon should be possible in other ferroelectrics systems through domain engineering. The ultraflexible epitaxial ferroelectric membranes could enable many applications such as flexible sensors, memories, and electronic skins.

scholarly journals Integrated Polypyrrole Flexible Conductors for Biochips and MEMS Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Rakefet Ofek Almog ◽  
Hadar Ben-Yoav ◽  
Yelena Sverdlov ◽  
Tsvi Shmilovich ◽  
Slava Krylov ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Aspect Ratio ◽  
Seed Layer ◽  
Conductive Polymer ◽  
Sensors And Actuators ◽  
Flexible Sensors ◽  
Planar Structures ◽  
Polymeric Substrates ◽  
Seed Layers ◽  
Structural Polymers

Integrated polypyrrole, a conductive polymer, interconnects on polymeric substrates were microfabricated for flexible sensors and actuators applications. It allows manufacturing of moving polymeric microcomponents suitable, for example, for micro-optical-electromechanical (MOEMS) systems or implanted sensors. This generic technology allows producing “all polymer” components where the polymers serve as both the structural and the actuating materials. In this paper we present two possible novel architectures that integrate polypyrrole conductors with other structural polymers: (a) polypyrrole embedded into flexible polydimethylsiloxane (PDMS) matrix forming high aspect ratio electrodes and (b) polypyrrole deposited on planar structures. Self-aligned polypyrrole electropolymerization was developed and demonstrated for conducting polymer lines on either gold or copper seed layers. The electropolymerization process, using cyclic voltammetry from an electrolyte containing the monomer, is described, as well as the devices’ characteristics. Finally, we discuss the effect of integrating conducting polymers with metal seed layer, thus enhancing the device durability and reliability.

Sign in / Sign up

Export Citation Format

Share Document