Rapid Moisture-Responsive Silk Fibroin Actuators

Manikandan, Ganesan; Murali, Aathira; Kumar, Ravi; Satapathy, Dillip K.

doi:10.1021/acsami.0c17525

Cited by 47 publications

(53 citation statements)

References 49 publications

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“…[ 23 , 24 ] Meanwhile, CNT has a small CTE (16–26 ppm K −1 ). [ 25 , 26 ] And the silk expands by absorbing water, [ 20 , 27 ] thus it loses water and shrinks when heated. When the CNT–Silk/BOPP actuator is driven by a voltage, the highly conductive CNT–Silk layer is used as an electrothermal heating component.…”

Section: Resultsmentioning

confidence: 99%

Pressure‐Perceptive Actuators for Tactile Soft Robots and Visual Logic Devices

et al. 2021

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Soft actuators with sensing capabilities are important in intelligent robots and human-computer interactions. However, present perceptive actuating systems rely on the integration of multiple functional units with complex circuit design. Here, a new-type pressure-perceptive actuator is reported, which integrates functions of sensing, actuating, and decision making at material level without complex combination. The actuator is composed of an actuating unit and a pressure-sensing unit, both of which are fabricated by carbon nanotube (CNT), silk, and polymer composite. On the one hand, the actuating unit can be driven by low voltages (<13 V), owing to a Joule-heating effect. On the other hand, the current passing the pressure-sensing unit can be controlled by tactile pressure. In the integrated actuator, it is able to control the deformation amplitude of actuating unit by applying different pressures on the pressure-sensing unit. A portable tactile-activated gripper is fabricated to operate an object through pressure control, demonstrating its application in tactile soft robots. Finally, three visual logic gates (AND, OR, and NOT) are proposed, which convert "tactile" inputs into "visible" deformation outputs, using the CNT-silk-based material for sensing and actuating in the decision-making process. This study provides a new path for intelligent soft robots and new-generation logic devices.

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Section: Resultsmentioning

confidence: 99%

Pressure‐Perceptive Actuators for Tactile Soft Robots and Visual Logic Devices

et al. 2021

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“…For this reason, PDMS and other silicone‐based electronic applications also may contain silk fibroin. [ 242 ] In addition to silkworm sourced ones, silk fibroin produced by the spider species with carbon nanotube coating was reported in sensing and actuating applications. [ 243 ]…”

Section: Sustainable Materials In Flexible Electronicsmentioning

confidence: 99%

Sustainable Macromolecular Materials in Flexible Electronics

Kılıçarslan

Bozyel

Gökcen

et al. 2022

Macro Materials & Eng

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With advances in electronics, the concept of flexible electronics has left traditional designs behind. Many concepts, such as sensors, transistors, soft robotics, data, and energy storage devices have begun to find more widespread and flexible areas of use. From this point of view, using environmentally friendly, abundant, and renewable natural materials that reduce carbon emissions in the production and disposal of these components is the first step toward the concept of sustainable flexible electronics. This review deals with the integration of sustainable natural materials obtained from plant, animal, and bacterial sources into sensors, displays, data storage, power generation, and soft robotic systems, with appropriate examples compiled from the last ten years. In addition, limitations in the use of sustainable materials as flexible electronic components and their potential for use in innovative electronic applications in the future are foreseen.

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“…This excellent actuation property enables the spider web to maintain its geometric configuration in a changing environment and even allows the spider to perceive the external load imposed on the web. [ 25 ] B. mori silk fibers have a molecular structure similar to that of spider silk proteins [ 125 ] and the ability to lift a small load through humidity‐induced cyclic contraction and expansion. Therefore, many studies have been conducted on humidity‐triggered silk fiber (yarn) actuators.…”

Section: Meso‐functionalized Silk Fibrous Devices and Applicationsmentioning

confidence: 99%

From Mesoscopic Functionalization of Silk Fibroin to Smart Fiber Devices for Textile Electronics and Photonics

Wu¹,

Ma²,

Liu³

2021

Advanced Science

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Bombyx mori silk fibers exhibit significant potential for applications in smart textiles, such as fiber sensors, fiber actuators, optical fibers, and energy harvester. Silk fibroin (SF) from B. mori silkworm fibers can be reconstructed/functionalized at the mesoscopic scale during refolding from the solution state into fibers. This facilitates the mesoscopic functionalization by engaging functional seeds in the refolding of unfolded SF molecules. In particular, SF solutions can be self-assembled into regenerated fiber devices by artificial spinning technologies, such as wet spinning, dry spinning, microfluidic spinning, electrospinning, and direct writing. Meso-functionalization manipulates the SF property from the mesoscopic scale, transforming the original silk fibers into smart fiber devices with smart functionalities, such as sensors, actuators, optical fibers, luminous fibers, and energy harvesters. In this review, the progress of mesoscopic structural construction from SF materials to fiber electronics/photonics is comprehensively summarized, along with the spinning technologies and fiber structure characterization methods. The applications, prospects, and challenges of smart silk fibers in textile devices for wearable personalized healthcare, self-propelled exoskeletons, optical and luminous fibers, and sustainable energy harvesters are also discussed.

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Rapid Moisture-Responsive Silk Fibroin Actuators

Cited by 47 publications

References 49 publications

Pressure‐Perceptive Actuators for Tactile Soft Robots and Visual Logic Devices

Pressure‐Perceptive Actuators for Tactile Soft Robots and Visual Logic Devices

Sustainable Macromolecular Materials in Flexible Electronics

From Mesoscopic Functionalization of Silk Fibroin to Smart Fiber Devices for Textile Electronics and Photonics

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