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Active Surface with Dynamic Microstructures and Hierarchical Gradient Enabled by in situ Pneumatic Control

An active surface with an on-demand tunable topography holds great potential for various applications, such as reconfigurable metasurfaces, adaptive microlenses, soft robots and four-dimensional (4D) printing. Despite extensive progress, to achieve refined control of microscale surface structures wi...

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Detalles Bibliográficos
Autores principales: Wang, Jian-Nan, Bai, Benfeng, Chen, Qi-Dai, Sun, Hong-Bo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7694221/
https://www.ncbi.nlm.nih.gov/pubmed/33158095
http://dx.doi.org/10.3390/mi11110992
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author Wang, Jian-Nan
Bai, Benfeng
Chen, Qi-Dai
Sun, Hong-Bo
author_facet Wang, Jian-Nan
Bai, Benfeng
Chen, Qi-Dai
Sun, Hong-Bo
author_sort Wang, Jian-Nan
collection PubMed
description An active surface with an on-demand tunable topography holds great potential for various applications, such as reconfigurable metasurfaces, adaptive microlenses, soft robots and four-dimensional (4D) printing. Despite extensive progress, to achieve refined control of microscale surface structures with large-amplitude deformation remains a challenge. Moreover, driven by the demand of constructing a large area of microstructures with increased complexity—for instance, biomimetic functional textures bearing a three-dimensional (3D) gradient—novel strategies are highly desired. Here, we develop an active surface with a dynamic topography and three-tier height gradient via a strain-tunable mismatching-bonding process. Pneumatic actuation allows for rapid, reversible and uniform regulation of surface microstructures at the centimeter scale. The in-situ modulation facilitates large-amplitude deformation with a maximum tuning range of 185 μm. Moreover, the structural gradient can be modulated by programming the strain value of the bonding process. With our strategy, another two types of surfaces with a four-tier gradient and without gradient were also prepared. By providing active modulation and design flexibility of complicated microstructures, the proposed strategy would unlock more opportunities for a wealth of novel utilizations.
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spelling pubmed-76942212020-11-28 Active Surface with Dynamic Microstructures and Hierarchical Gradient Enabled by in situ Pneumatic Control Wang, Jian-Nan Bai, Benfeng Chen, Qi-Dai Sun, Hong-Bo Micromachines (Basel) Article An active surface with an on-demand tunable topography holds great potential for various applications, such as reconfigurable metasurfaces, adaptive microlenses, soft robots and four-dimensional (4D) printing. Despite extensive progress, to achieve refined control of microscale surface structures with large-amplitude deformation remains a challenge. Moreover, driven by the demand of constructing a large area of microstructures with increased complexity—for instance, biomimetic functional textures bearing a three-dimensional (3D) gradient—novel strategies are highly desired. Here, we develop an active surface with a dynamic topography and three-tier height gradient via a strain-tunable mismatching-bonding process. Pneumatic actuation allows for rapid, reversible and uniform regulation of surface microstructures at the centimeter scale. The in-situ modulation facilitates large-amplitude deformation with a maximum tuning range of 185 μm. Moreover, the structural gradient can be modulated by programming the strain value of the bonding process. With our strategy, another two types of surfaces with a four-tier gradient and without gradient were also prepared. By providing active modulation and design flexibility of complicated microstructures, the proposed strategy would unlock more opportunities for a wealth of novel utilizations. MDPI 2020-11-04 /pmc/articles/PMC7694221/ /pubmed/33158095 http://dx.doi.org/10.3390/mi11110992 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Jian-Nan
Bai, Benfeng
Chen, Qi-Dai
Sun, Hong-Bo
Active Surface with Dynamic Microstructures and Hierarchical Gradient Enabled by in situ Pneumatic Control
title Active Surface with Dynamic Microstructures and Hierarchical Gradient Enabled by in situ Pneumatic Control
title_full Active Surface with Dynamic Microstructures and Hierarchical Gradient Enabled by in situ Pneumatic Control
title_fullStr Active Surface with Dynamic Microstructures and Hierarchical Gradient Enabled by in situ Pneumatic Control
title_full_unstemmed Active Surface with Dynamic Microstructures and Hierarchical Gradient Enabled by in situ Pneumatic Control
title_short Active Surface with Dynamic Microstructures and Hierarchical Gradient Enabled by in situ Pneumatic Control
title_sort active surface with dynamic microstructures and hierarchical gradient enabled by in situ pneumatic control
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7694221/
https://www.ncbi.nlm.nih.gov/pubmed/33158095
http://dx.doi.org/10.3390/mi11110992
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