Premium
Template‐Assisted Electroforming of Fully Semi‐Hard‐Magnetic Helical Microactuators
Author(s) -
Chatzipirpiridis George,
de Marco Carmela,
Pellicer Eva,
Ergeneman Olgaç,
Sort Jordi,
Nelson Bradley J.,
Pané Salvador
Publication year - 2018
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201800179
Subject(s) - mandrel , electroforming , materials science , fabrication , polymer , nanotechnology , coating , composite material , silicon , optoelectronics , medicine , alternative medicine , layer (electronics) , pathology
The authors report on the fabrication of semi‐hard‐magnetic microhelices using template‐assisted electroforming. The method consists of electrodepositing a material on a sacrificial mandrel on which a pattern has been previously written. To electroform the helical microswimmers, a helical template on a polymer‐coated metallic mandrel is created using a laser, which precisely ablates the polymer coating and exposes the mandrel surface. Subsequently, the semi‐hard‐magnetic material is electrodeposited in the trenches produced by the laser. In this investigation, the helical structures are obtained from an electrolyte, which enables the production of hard‐magnetic CoPt alloys. The authors also show that electroformed semi‐hard‐magnetic helical microswimmers can propel in viscous environments such as silicon oil in three dimensions and against gravity. Their manufacturing approach can be used for the fabrication of more complex architectures for a wide range of applications and can be potentially extended to any electroplatable material.