High‐Load Shape Memory Microgripper with Embedded Resistive Heating and Magnetic Actuation

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 3, 2025

Abstract Magnetically actuated soft grippers find extensive applications in robotics due to their rapid response, biological safety, and wireless control capabilities. However, these systems often require a continuously applied magnetic field during both the capture release processes, which reduces load capacity makes gripping ferromagnetic objects challenging. Here, an electrothermal‐magnetic shape memory (EM‐SMP) microgripper is developed. By incorporating Fe₃O₄ particles into polymer (SMP) embedding resistive wires, can respond electric current field. The high thermal conductivity of composite material, coupled with microscale dimensions achieved via femtosecond laser processing, significantly enhances response speed (≈0.9 s). only open gripper, while closure realized through electrothermal‐triggered effect, allowing sequential safely grip delicate without interference. Upon cooling, closed state SMP gripper locks place energy consumption. Furthermore, claw‐shaped design allows enclose larger grasping, thereby improving load‐to‐weight ratio (≈2380). This demonstrates broad application potential, effectively performing grasp tasks across diverse materials, sizes, shapes, states, extreme environmental conditions (acidic alkaline).

Язык: Английский

---

A Robotic Prosthetic Hand for Computer Mouse Operations

Advanced Intelligent Systems, Год журнала: 2025, Номер unknown

Опубликована: Март 2, 2025

Individuals with upper limb amputation face significant difficulty in operating standard computer peripherals their prostheses, particularly the mouse, due to constraints imposed by current prosthetic hand designs and irregular shape of mouse. This work introduces a soft myoelectric prosthesis system for different physical mouses. The proposed has two tendon‐driven fingers three fin‐ray fingers. It enables an enveloping grasp mouse facilitates diverse finger‐based clicking scrolling operations. In addition, mapping between movements (myoelectric signals) operations is created combining neural network classifier post‐processing algorithm. Herein, system's performance evaluated through series cursor control tasks involving both able‐bodied amputee participants. experimental results, it shown that effectively individuals transradial operate using residual limbs. Compared traditional method based on surface electromyography, participants exhibit improved task (shorter completion time higher throughput) user experience (reduced muscle use questionnaire scores).

Язык: Английский

---

SCS: Superior‐Vena‐Cava Compressing Shape‐Memory‐Alloy‐Based Implantable Device for Heart Failure

Advanced Engineering Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 13, 2025

Heart failure (HF), particularly acute decompensated heart (ADHF), remains a significant health challenge, with limited long‐term therapeutic options to alleviate congestion and improve cardiac function. Pharmacological treatments focus on reducing congestion, but many patients are discharged persistent symptoms, leading poor outcomes. Current device‐based solutions, such as balloon catheters, offer some relief from fluid overload require hospitalization, driveline, direct blood contact, limiting use. A s uperior‐vena‐cava (SVC) c ompressive hape‐memory‐alloy (SMA) implantable device, “SCS” is presented, which designed wrap around the SVC externally compress it regulate flow, alleviating ADHF symptoms. The SCS actuated by biocompatible SMA actuators, adjusts SVC's cross‐sectional area control flow. Unlike existing device operates without minimizing thrombosis endothelial damage while offering solution. Benchtop tests verified SCS's effectiveness in flow regulation (68% decrease rate) maintaining safe surface temperature (<40 °C). In‐vivo porcine model demonstrated device's ability reduce left ventricular preload, observed through leftward shift pressure‐volume loop (18.6% reduction end‐diastolic volume), validating its potential solution for ADHF.

Язык: Английский

---

Overcoming Response-Recovery Kinetic Mismatch in Soft Actuators Via Synergistic Material Design for Multimodal Moisture-Responsive Actuation

Опубликована: Янв. 1, 2025

Язык: Английский

---

Bio-Inspired Ionic Sensors: Transforming Natural Mechanisms into Sensory Technologies

Nano-Micro Letters, Год журнала: 2025, Номер 17(1)

Опубликована: Март 12, 2025

Abstract Many natural organisms have evolved unique sensory systems over millions of years that allowed them to detect various changes in their surrounding environments. Sensory feature numerous receptors—such as photoreceptors, mechanoreceptors, and chemoreceptors—that types external stimuli, including light, pressure, vibration, sound, chemical substances. These stimuli are converted into electrochemical signals, which transmitted the brain produce sensations sight, touch, hearing, taste, smell. Inspired by biological principles systems, recent advancements electronics led a wide range applications artificial sensors. In current review, we highlight developments sensors inspired utilizing soft ionic materials. The versatile characteristics these materials introduced while focusing on mechanical electrical properties. features working sensing investigated terms six categories: vision, tactile, gustatory, olfactory, proximity sensing. Lastly, explore several challenges must be overcome outlining future research directions field

Язык: Английский

---

Innovative approaches in bioadhesive design: A comprehensive review of crosslinking methods and mechanical performance

Biomaterials Advances, Год журнала: 2025, Номер 173, С. 214287 - 214287

Опубликована: Март 15, 2025

Язык: Английский

---

Agile and controllable rolling actuators based on cylindrical dielectric elastomers: Mechanism, performance, and applications

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161750 - 161750

Опубликована: Март 1, 2025

Язык: Английский

---

Soft Materials and Devices Enabling Sensorimotor Functions in Soft Robots

Chemical Reviews, Год журнала: 2025, Номер unknown

Опубликована: Март 31, 2025

Sensorimotor functions, the seamless integration of sensing, decision-making, and actuation, are fundamental for robots to interact with their environments. Inspired by biological systems, incorporation soft materials devices into robotics holds significant promise enhancing these functions. However, current systems often lack autonomy intelligence observed in nature due limited sensorimotor integration, particularly flexible sensing actuation. As field progresses toward soft, flexible, stretchable materials, developing such becomes increasingly critical advanced robotics. Despite rapid advancements individually devices, combined applications enable capabilities emerging. This review addresses this emerging providing a comprehensive overview that functions robots. We delve latest development technologies, actuation mechanism, structural designs, fabrication techniques. Additionally, we explore strategies control, artificial (AI), practical application across various domains as healthcare, augmented virtual reality, exploration. By drawing parallels aims guide future research robots, ultimately adaptability unstructured

Язык: Английский

---

Multiplexed Sensing Textiles Enabled by Reconfigurable Weaving Meso-Structures for Intricate Kinematic Posture Recognition and Thermal Therapy Healthcare

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

Wearable sensing textiles with multimodal mechanical stimulation detection capabilities have broad applications, such as sports guidance and rehabilitation training. However, current mainstream typically rely on combining discrete sensors single functions intensively through sewing or adhesion to detect various stimuli. Herein, an all-in-one multiplexed textile (MPST) capable of simultaneously detecting pressure tensile strain is achieved by engineering innovative hierarchical architecture textiles. The functionality MPST directly derived from the reconfigurable pathways woven meso-structures, enabling it exhibit excellent sensitivity (0.1 kPa-1), wide range (0-100%), superior durability, desirable wearability. With assistance Long Short-Term Memory (LSTM) algorithm, wearable system achieves a recognition accuracy 97.5% in human kinematic postures elbow, knee, foot. In addition, demonstrates outstanding joule heating performance, which reaches 57.1 °C at 2.5 V applied voltage. its performance ability, holds great potential for applications training guidance, assistive training, soft robotics.

Язык: Английский

---

Heparin Doped Polyaniline for Anticoagulation Supercapacitors

Advanced Healthcare Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 9, 2025

Abstract With the rapid development of implantable electronic medical devices, supercapacitors have gained significant attention as energy storage devices due to their inherent advantages. However, these inevitably direct contact with blood and trigger coagulation or thrombus formation when implanted in body. In severe cases, negative effects compromise functionality system even jeopardize human health. Herein, a biocompatible electrode material high anticoagulant activity is designed by doping polyaniline macromolecule heparin under neutral conditions, which macromolecules dopants conditions not only avoids toxicity acids biological tissues de‐doping caused small molecules, but also imparts properties material. Based on situ polymerization approach, an all‐in‐one anticoagulation supercapacitor employed manufacture exhibits good electrochemical performance (energy density 18.89 µWh cm −2 power 197.8 µW ), cycling stability (capacitance retention 70.23% after 2, 000 cycles), (APTT 15.47 s, PT 16.57 TT 49.47 FIB 1.12 g L −1 tissue compatibility. The strategy provides valuable reference for supply bioelectronics.

Язык: Английский

---