Temperature-Responsive 4D Liquid Crystal Microactuators Fabricated by Direct Laser Writing by Two-Photon Polymerization
File Type:
PDFItem Type:
Journal ArticleDate:
2021Access:
openAccessCitation:
Marc del Pozo, Colm Delaney, Marina Pilz da Cunha, Michael G. Debije, Larisa Florea, Albert P. H. J. Schenning, Temperature-Responsive 4D Liquid Crystal Microactuators Fabricated by Direct Laser Writing by Two-Photon Polymerization, Small Structures, 2021, 10.1002/sstr.2Download Item:
Temperature-Responsive 4D Liquid Crystal Microactuators Fabricated by Direct Laser Writing by Two-Photon Polymerization - TARA.pdf (Published (author's copy) - Peer Reviewed) 2.725Mb
Abstract:
Over the past decade, progress in direct laser writing by two-photon polymerization (DLW-TPP) of stimuli-responsive materials has made considerable inroads into the realization of microactuators. With the focus on performing complex tasks such as walking, grasping, or delivering drugs, these actuators require a controlled preprogrammed actuation. Liquid crystalline microactuators enable such programmed movement when the mesogenic alignment can be successfully controlled. To date, this has necessitated low crosslink density networks, which are not readily conducive to the fabrication of 3D geometries. Herein, a liquid crystalline photoresist is reported, which results in a highly crosslinked network, that permits fabrication of 4D microactuators having a highly crosslinked network in which the molecular alignment is determined by the alignment layers in the cell construct. In addition to controllable deformation of the microactuators, they also display a characteristic and unique polarization color that can be used for both identification and reporting in real time, enabling their integration into sensing and anti-anticounterfeiting microdevices.
URI:
https://onlinelibrary.wiley.com/doi/full/10.1002/sstr.202100158http://hdl.handle.net/2262/97930
Sponsor
Grant Number
European Commission
No. 899349 - 5D Nanoprinting
Science Foundation Ireland (SFI)
12/RC/2278_P2
Irish Research Council (IRC)
GOIPD/2020/484
Author's Homepage:
http://people.tcd.ie/florealhttp://people.tcd.ie/cdelane5
Description:
PUBLISHED
Author: Florea, Larisa; Delaney, Colm
Type of material:
Journal ArticleURI:
https://onlinelibrary.wiley.com/doi/full/10.1002/sstr.202100158http://hdl.handle.net/2262/97930
Collections:
Series/Report no:
Small StructuresAvailability:
Full text availableKeywords:
Responsive microstructures, Two-photon polymerization, Liquid crystals, Four-dimensional printing, Microrobots, Direct laser writingSubject (TCD):
Nanoscience & Materials , LIQUID-CRYSTAL , LIQUID-CRYSTALS , POLYMER , direct laser writingDOI:
https://doi.org/10.1002/sstr.202100158Licences: