Enhancement of Magneto-Mechanical Actuation of Micropillar Arrays by Anisotropic Stress Distribution
- Authors
- Park, Jeong Eun; Jeon, Jisoo; Park, Sei Jin; Won, Sukyoung; Ku, Zahyun; Wie, Jeong Jae
- Issue Date
- Sep-2020
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- magneto-actuation; micropillar arrays; polymeric composites; reversible deformation; shape reconfiguration
- Citation
- SMALL, v.16, no.38, pp.1 - 8
- Indexed
- SCIE
SCOPUS
- Journal Title
- SMALL
- Volume
- 16
- Number
- 38
- Start Page
- 1
- End Page
- 8
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190086
- DOI
- 10.1002/smll.202003179
- ISSN
- 1613-6810
- Abstract
- Magnetically active shape-reconfigurable microarrays undergo programmed actuation according to the arrangement of magnetic dipoles within the structures, achieving complex twisting and bending deformations. Cylindrical micropillars have been widely used to date, whose circular cross-sections lead to identical actuation regardless of the actuating direction. In this study, micropillars with triangular or rectangular cross-sections are designed and fabricated to introduce preferential actuation directions and explore the limits of their actuation. Using such structures, controlled liquid wetting is demonstrated on micropillar surfaces. Liquid droplets pinned on magnetic micropillar arrays undergo directional spreading when the pillars are actuated as depinning of the droplets is enabled only in certain directions. The enhanced deformation due to direction dependent magneto-mechanical actuation suggests that micropillar arrays can be fundamentally tailored to possess application specific responses and opens up opportunities to exploit more complex designs such as micropillars with polygonal cross sections. Such tunable wetting of liquids on microarray surfaces has potential to improve printing technologies via contactless reconfiguration of stamp geometry by magnetic field manipulation.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 유기나노공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190086)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.