A mobile magnetic pad with fast light-switchable adhesion capabilities

Abstract

Octopus suckers that possess the ability to actively control adhesion through muscle actuation have inspired artificial adhesives for safe manipulation of thin and delicate objects. However, the design of adhesives with fast adhesion switching speed to transport cargoes in confined spaces remains an open challenge. Here, we present an untethered magnetic adhesive pad combining the functionality of fast adhesion switching and remotely controlled locomotion. The adhesive pad can be activated from low-adhesion state to high-adhesion state by near infrared laser within 30 s, allowing to fulfill a high-throughput task of retrieving and releasing objects. Moreover, under the guidance of external magnetic field, the proposed pad is demonstrated to transport thin and fragile electronic components across a tortuous path, thus indicating its potential for dexterous delivery in complex working environments.

Advanced Bionic Attachment Equipment Inspired by the Attachment Performance of Aquatic Organisms: A Review

“…It can be used as an electrothermally actuating transporting device of wet and dry pliable surfaces (reproduced with permission from [ 138 ], American Chemical Society, Copyright 2021). ( l ) A mobile magnetic pad that has fast light-switchable attachment capabilities (reproduced with permission from [ 139 ], IOP Publishing Ltd., Copyright 2021). ( m ) A honeycomb structure with a soft elastic film.…”

“…This biomimetic device could be integrated into programmable transporting devices, and smart medical grippers and soft robots could flexibly attach and release dry and wet thin objects. Afterward, an optically switchable attachment patch with magnetic field-driven motion was designed by Su Lin et al ( Figure 6 l) [ 139 ]. It could drive movement without restraining and controlling the attachment and separation process of attachment patches and could be used in assembling high-performance electronic components in confined spaces or closed environments in robotics.…”

3D‐Printed Micro/Nano‐Scaled Mechanical Metamaterials: Fundamentals, Technologies, Progress, Applications, and Challenges

“…For example, a biomimetic structure with variable adhesion properties was fabricated from a cavity-patterned magnetic polymer pad and a thermo-responsive hydrogel layer to transport thin and fragile objects. [169] Upon heating the magnetic pad under The application of thermal responsive materials in a) bone tissue engineering scaffolds (Reproduced with permission. [158] Copyright 2022, Wiley-VCH.…”

Multifunctional Biomimetic Microstructured Surfaces for Healthcare Applications

“…reported a microstructured adhesive pad with dual stimulation response of light and magnetism. [ 64 ] By introducing magnetic particles with photothermal effect and thermally responsive hydrogel, the adhesive pad is equipped with the ability to photomodulate the adhesion strength within 30 s. The magnetic particles can drive the adhesive pad to move in a specific direction under a magnetic field.…”