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Статті в журналах з теми "Self-Healing, Flexible electronics,soft robotics"
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Su, Jheng-Wun, Xiang Tao, Heng Deng, Cheng Zhang, Shan Jiang, Yuyi Lin, and Jian Lin. "4D printing of a self-morphing polymer driven by a swellable guest medium." Soft Matter 14, no. 5 (2018): 765–72. http://dx.doi.org/10.1039/c7sm01796k.
Повний текст джерелаАнотація:
There is a significant need of advanced materials that can be fabricated into functional devices with defined three-dimensional (3D) structures for application in tissue engineering, flexible electronics, and soft robotics.
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Raman, Srinivasan, and Ravi Sankar Arunagirinathan. "Silver Nanowires in Stretchable Resistive Strain Sensors." Nanomaterials 12, no. 11 (June 6, 2022): 1932. http://dx.doi.org/10.3390/nano12111932.
Повний текст джерелаАнотація:
Silver nanowires (AgNWs), having excellent electrical conductivity, transparency, and flexibility in polymer composites, are reliable options for developing various sensors. As transparent conductive electrodes (TCEs), AgNWs are applied in optoelectronics, organic electronics, energy devices, and flexible electronics. In recent times, research groups across the globe have been concentrating on developing flexible and stretchable strain sensors with a specific focus on material combinations, fabrication methods, and performance characteristics. Such sensors are gaining attention in human motion monitoring, wearable electronics, advanced healthcare, human-machine interfaces, soft robotics, etc. AgNWs, as a conducting network, enhance the sensing characteristics of stretchable strain-sensing polymer composites. This review article presents the recent developments in resistive stretchable strain sensors with AgNWs as a single or additional filler material in substrates such as polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), polyurethane (PU), and other substrates. The focus is on the material combinations, fabrication methods, working principles, specific applications, and performance metrics such as sensitivity, stretchability, durability, transparency, hysteresis, linearity, and additional features, including self-healing multifunctional capabilities.
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Lian, Jia-Jin, Wen-Tao Guo, and Qi-Jun Sun. "Emerging Functional Polymer Composites for Tactile Sensing." Materials 16, no. 12 (June 11, 2023): 4310. http://dx.doi.org/10.3390/ma16124310.
Повний текст джерелаАнотація:
In recent years, extensive research has been conducted on the development of high-performance flexible tactile sensors, pursuing the next generation of highly intelligent electronics with diverse potential applications in self-powered wearable sensors, human–machine interactions, electronic skin, and soft robotics. Among the most promising materials that have emerged in this context are functional polymer composites (FPCs), which exhibit exceptional mechanical and electrical properties, enabling them to be excellent candidates for tactile sensors. Herein, this review provides a comprehensive overview of recent advances in FPCs-based tactile sensors, including the fundamental principle, the necessary property parameter, the unique device structure, and the fabrication process of different types of tactile sensors. Examples of FPCs are elaborated with a focus on miniaturization, self-healing, self-cleaning, integration, biodegradation, and neural control. Furthermore, the applications of FPC-based tactile sensors in tactile perception, human–machine interaction, and healthcare are further described. Finally, the existing limitations and technical challenges for FPCs-based tactile sensors are briefly discussed, offering potential avenues for the development of electronic products.
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Heidarian, Pejman, and Abbas Z. Kouzani. "Starch-g-Acrylic Acid/Magnetic Nanochitin Self-Healing Ferrogels as Flexible Soft Strain Sensors." Sensors 23, no. 3 (January 19, 2023): 1138. http://dx.doi.org/10.3390/s23031138.
Повний текст джерелаАнотація:
Mechanically robust ferrogels with high self-healing ability might change the design of soft materials used in strain sensing. Herein, a robust, stretchable, magneto-responsive, notch insensitive, ionic conductive nanochitin ferrogel was fabricated with both autonomous self-healing and needed resilience for strain sensing application without the need for additional irreversible static chemical crosslinks. For this purpose, ferric (III) chloride hexahydrate and ferrous (II) chloride as the iron source were initially co-precipitated to create magnetic nanochitin and the co-precipitation was confirmed by FTIR and microscopic images. After that, the ferrogels were fabricated by graft copolymerisation of acrylic acid-g-starch with a monomer/starch weight ratio of 1.5. Ammonium persulfate and magnetic nanochitin were employed as the initiator and crosslinking/nano-reinforcing agents, respectively. The ensuing magnetic nanochitin ferrogel provided not only the ability to measure strain in real-time under external magnetic actuation but also the ability to heal itself without any external stimulus. The ferrogel may also be used as a stylus for a touch-screen device. Based on our findings, our research has promising implications for the rational design of multifunctional hydrogels, which might be used in applications such as flexible and soft strain sensors, health monitoring, and soft robotics.
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Ankit, Naveen Tiwari, Fanny Ho, Febby Krisnadi, Mohit Rameshchandra Kulkarni, Linh Lan Nguyen, Soo Jin Adrian Koh, and Nripan Mathews. "High-k, Ultrastretchable Self-Enclosed Ionic Liquid-Elastomer Composites for Soft Robotics and Flexible Electronics." ACS Applied Materials & Interfaces 12, no. 33 (July 20, 2020): 37561–70. http://dx.doi.org/10.1021/acsami.0c08754.
Повний текст джерела
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Nyabadza, Anesu, Mercedes Vázquez, Shirley Coyle, Brian Fitzpatrick, and Dermot Brabazon. "Review of Materials and Fabrication Methods for Flexible Nano and Micro-Scale Physical and Chemical Property Sensors." Applied Sciences 11, no. 18 (September 15, 2021): 8563. http://dx.doi.org/10.3390/app11188563.
Повний текст джерелаАнотація:
The use of flexible sensors has tripled over the last decade due to the increased demand in various fields including health monitoring, food packaging, electronic skins and soft robotics. Flexible sensors have the ability to be bent and stretched during use and can still maintain their electrical and mechanical properties. This gives them an advantage over rigid sensors that lose their sensitivity when subject to bending. Advancements in 3D printing have enabled the development of tailored flexible sensors. Various additive manufacturing methods are being used to develop these sensors including inkjet printing, aerosol jet printing, fused deposition modelling, direct ink writing, selective laser melting and others. Hydrogels have gained much attention in the literature due to their self-healing and shape transforming. Self-healing enables the sensor to recover from damages such as cracks and cuts incurred during use, and this enables the sensor to have a longer operating life and stability. Various polymers are used as substrates on which the sensing material is placed. Polymers including polydimethylsiloxane, Poly(N-isopropylacrylamide) and polyvinyl acetate are extensively used in flexible sensors. The most widely used nanomaterials in flexible sensors are carbon and silver due to their excellent electrical properties. This review gives an overview of various types of flexible sensors (including temperature, pressure and chemical sensors), paying particular attention to the application areas and the corresponding characteristics/properties of interest required for such. Current advances/trends in the field including 3D printing, novel nanomaterials and responsive polymers, and self-healable sensors and wearables will also be discussed in more detail.
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Huang, Changjin, David Quinn, Subra Suresh, and K. Jimmy Hsia. "Controlled molecular self-assembly of complex three-dimensional structures in soft materials." Proceedings of the National Academy of Sciences 115, no. 1 (December 18, 2017): 70–74. http://dx.doi.org/10.1073/pnas.1717912115.
Повний текст джерелаАнотація:
Many applications in tissue engineering, flexible electronics, and soft robotics call for approaches that are capable of producing complex 3D architectures in soft materials. Here we present a method using molecular self-assembly to generate hydrogel-based 3D architectures that resembles the appealing features of the bottom-up process in morphogenesis of living tissues. Our strategy effectively utilizes the three essential components dictating living tissue morphogenesis to produce complex 3D architectures: modulation of local chemistry, material transport, and mechanics, which can be engineered by controlling the local distribution of polymerization inhibitor (i.e., oxygen), diffusion of monomers/cross-linkers through the porous structures of cross-linked polymer network, and mechanical constraints, respectively. We show that oxygen plays a role in hydrogel polymerization which is mechanistically similar to the role of growth factors in tissue growth, and the continued growth of hydrogel enabled by diffusion of monomers/cross-linkers into the porous hydrogel similar to the mechanisms of tissue growth enabled by material transport. The capability and versatility of our strategy are demonstrated through biomimetics of tissue morphogenesis for both plants and animals, and its application to generate other complex 3D architectures. Our technique opens avenues to studying many growth phenomena found in nature and generating complex 3D structures to benefit diverse applications.
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Gong, Yanting, Yi-Zhou Zhang, Shiqiang Fang, Chen Liu, Jian Niu, Guanjun Li, Fang Li, Xiangchun Li, Tao Cheng, and Wen-Yong Lai. "Artificial intelligent optoelectronic skin with anisotropic electrical and optical responses for multi-dimensional sensing." Applied Physics Reviews 9, no. 2 (June 2022): 021403. http://dx.doi.org/10.1063/5.0083278.
Повний текст джерелаАнотація:
Artificial intelligent skins hold the potential to revolutionize artificial intelligence, health monitoring, soft robotics, biomedicine, flexible, and wearable electronics. Present artificial skins can be characterized into electronic skins ( e-skins) that convert external stimuli into electrical signals and photonic skins ( p-skins) that convert deformations into intuitive optical feedback. Merging both electronic and photonic functions in a single skin is highly desirable, but challenging and remains yet unexplored. We report herein a brand-new type of artificial intelligent skin, an optoelectronic skin ( o-skin), which combines the advantages of both e-skins and p-skins in a single skin device based on one-dimensional photonic crystal-based hydrogels. Taking advantage of its anisotropic characteristics, the resulting o-skin can easily distinguish vector stimuli such as stress type and movement direction to meet the needs of multi-dimensional perception. Furthermore, the o-skin also demonstrates advanced functions such as full-color displays and intelligent response to the environment in the form of self-adaptive camouflage. This work represents a substantial advance in using the molecular engineering strategy to achieve artificial intelligent skins with multiple anisotropic responses that can be integrated on the skin of a soft body to endow superior functions, just like the natural organisms that inspire us.
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Ito, Takatoshi, Eri Fukuchi, Kenta Tanaka, Yuki Nishiyama, Naoto Watanabe, and Ohmi Fuchiwaki. "Vision Feedback Control for the Automation of the Pick-and-Place of a Capillary Force Gripper." Micromachines 13, no. 8 (August 7, 2022): 1270. http://dx.doi.org/10.3390/mi13081270.
Повний текст джерелаАнотація:
In this paper, we describe a newly developed vision feedback method for improving the placement accuracy and success rate of a single nozzle capillary force gripper. The capillary force gripper was developed for the pick-and-place of mm-sized objects. The gripper picks up an object by contacting the top surface of the object with a droplet formed on its nozzle and places the object by contacting the bottom surface of the object with a droplet previously applied to the place surface. To improve the placement accuracy, we developed a vision feedback system combined with two cameras. First, a side camera was installed to capture images of the object and nozzle from the side. Second, from the captured images, the contour of the pre-applied droplet for placement and the contour of the object picked up by the nozzle were detected. Lastly, from the detected contours, the distance between the top surface of the droplet for object release and the bottom surface of the object was measured to determine the appropriate amount of nozzle descent. Through the experiments, we verified that the size matching effect worked reasonably well; the average placement error minimizes when the size of the cross-section of the objects is closer to that of the nozzle. We attributed this result to the self-alignment effect. We also confirmed that we could control the attitude of the object when we matched the shape of the nozzle to that of the sample. These results support the feasibility of the developed vision feedback system, which uses the capillary force gripper for heterogeneous and complex-shaped micro-objects in flexible electronics, micro-electro-mechanical systems (MEMS), soft robotics, soft matter, and biomedical fields.
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Deriabin, Konstantin V., Sofia S. Filippova, and Regina M. Islamova. "Self-Healing Silicone Materials: Looking Back and Moving Forward." Biomimetics 8, no. 3 (July 3, 2023): 286. http://dx.doi.org/10.3390/biomimetics8030286.
Повний текст джерелаАнотація:
This review is dedicated to self-healing silicone materials, which can partially or entirely restore their original characteristics after mechanical or electrical damage is caused to them, such as formed (micro)cracks, scratches, and cuts. The concept of self-healing materials originated from biomaterials (living tissues) capable of self-healing and regeneration of their functions (plants, human skin and bones, etc.). Silicones are ones of the most promising polymer matrixes to create self-healing materials. Self-healing silicones allow an increase of the service life and durability of materials and devices based on them. In this review, we provide a critical analysis of the current existing types of self-healing silicone materials and their functional properties, which can be used in biomedicine, optoelectronics, nanotechnology, additive manufacturing, soft robotics, skin-inspired electronics, protection of surfaces, etc.
Дисертації з теми "Self-Healing, Flexible electronics,soft robotics"
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Parab, Virendra. "Electric Field Assisted Self-Healing (eFASH)." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4912.
Повний текст джерелаАнотація:
Circuit failure due to the open faults in the interconnect is the most common problem regarding the reliability of electronic systems. This is particularly true for large-area electronic systems such as display, image sensor arrays, as well flexible and wearable electronic systems. To address this problem, various techniques to repair fractured interconnect in real-time have been investigated. One approach that is of interest to this work is the electric field-assisted self-healing (eFASH). The eFASH technique involves the use of a low concentration dispersion of conductive particles in an insulating fluid that is encapsulated over interconnect. When a current-carrying interconnect is fractured an electric field appears across the open fault. This field polarizes the conductive particles, subsequently chains them up to create a heal. This work discusses the mechanism of self-healing and studies the impact of the dispersion concentration on the healing time, heal impedance and cross-talk. Theoretical predictions have been substantiated by experimental evidence and an optimum dispersion concentration for effective self-healing is identified. The application of eFASH for stretchable electronics also has been studied and stretchable heals having a conductivity about 5 * 10^5 S/m and allowing strains from 12 to 60 during stretching have been demonstrated.ISRO, EPSRC (Grant No. RG92121) and DST IMPRINT (Grant No. 7969).
Тези доповідей конференцій з теми "Self-Healing, Flexible electronics,soft robotics"
1
Wang, Yu-Cheng, Eetu Kohtanen, and Alper Erturk. "Characterization of a Multifunctional Bioinspired Piezoelectric Swimmer and Energy Harvester." In ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/smasis2020-2444.
Повний текст джерелаАнотація:
Abstract Fiber-based flexible piezoelectric composites with interdigitated electrodes, namely Macro-Fiber Composite (MFC) structures, strike a balance between the deformation and actuation force capabilities for effective underwater bio-inspired locomotion. These materials are also suitable for vibration-based energy harvesting toward enabling self-powered electronic components. In this work, we design, fabricate, and experimentally characterize an MFC-based bio-inspired swimmer-energy harvester platform. Following in vacuo and in air frequency response experiments, the proposed piezoelectric robotic fish platform is tested and characterized under water for its swimming performance both in free locomotion (in a large water tank) and also in a closed-loop water channel under imposed flow. In addition to swimming speed characterization under resonant actuation, hydrodynamic thrust resultant in both quiescent water and under imposed flow are quantified experimentally. We show that the proposed design easily produces thrust levels on the order of biological fish with similar dimensions. Overall it produces thrust levels higher than other smart material-based designs (such as soft material-based concepts), while offering geometric scalability and silent operation unlike large scale robotic fish platforms that use conventional and bulky actuators. The performance of this untethered swimmer platform in piezoelectric energy harvesting is also quantified by underwater base excitation experiments in a quiescent water and via vortex induced-vibration (VIV) experiments under imposed flow in a water channel. Following basic resistor sweep experiments in underwater base excitation experiments, VIV tests are conducted for cylindrical bluff body configurations of different diameters and distances from the leading edge of the energy harvesting tail portion. The resulting concept and design can find use for underwater swimmer and sensor applications such as ecological monitoring, among others.