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A bioinspired snap-through metastructure for manipulating micro-objects

  • Micro-objects stick tenaciously to each other—a well-known show-stopper in microtechnology and in handling micro-objects. Inspired by the trigger plant, we explore a mechanical metastructure for overcoming adhesion involving a snap-action mechanism. We analyze the nonlinear mechanical response of curved beam architectures clamped by a tunable spring, incorporating mono- and bistable states. As a result, reversible miniaturized snap-through devices are successfully realized by micron-scale direct printing, and successful pick-and-place handling of a micro-object is demonstrated. The technique is applicable to universal scenarios, including dry and wet environment, or smooth and rough counter surfaces. With an unprecedented switching ratio (between high and low adhesion) exceeding 104, this concept proposes an efficient paradigm for handling and placing superlight objects. Nature teaches us how to design reliable grippers for moving and placing super-small objects that tend to stick to everywhere.

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Document Type:Article
Author:Xuan ZhangORCiD, Yue WangORCiD, Tian Zhihao, Manar SamriORCiD, Karsten MohORCiD, Robert M. McMeekingORCiD, René HenselORCiD, Eduard ArztORCiD
Parent Title (English):Science Advances
First Page:eadd4768
Date of first Publication:2022/12/02
Release Date:2022/12/02
Impact:14.136 (2021)
Funding Information:Leibniz Competition grant MUSIGAND, no. K279/2019
Groups:Funktionelle Mikrostrukturen
DDC classes:600 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften und Maschinenbau
Open Access:Open Access
Signature:INM 2022/096
Licence (German):License LogoCreative Commons - CC BY-NC - Namensnennung - Nicht kommerziell 4.0 International