Morphing of liquid crystal surfaces by emergent collectivity

Hanne M. van der Kooij, Slav A. Semerdzhiev, Jesse Buijs, Dirk J. Broer, Danqing Liu, Joris Sprakel (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

2 Citaten (Scopus)
31 Downloads (Pure)

Samenvatting

Liquid crystal surfaces can undergo topographical morphing in response to external cues. These shape-shifting coatings promise a revolution in various applications, from haptic feedback in soft robotics or displays to self-cleaning solar panels. The changes in surface topography can be controlled by tailoring the molecular architecture and mechanics of the liquid crystal network. However, the nanoscopic mechanisms that drive morphological transitions remain unclear. Here, we introduce a frequency-resolved nanostrain imaging method to elucidate the emergent dynamics underlying field-induced shape-shifting. We show how surface morphing occurs in three distinct stages: (i) the molecular dipoles oscillate with the alternating field (10–100 ms), (ii) this leads to collective plasticization of the glassy network (~1 s), (iii) culminating in actuation of the topography (10–100 s). The first stage appears universal and governed by dielectric coupling. By contrast, yielding and deformation rely on a delicate balance between liquid crystal order, field properties and network viscoelasticity.

Originele taal-2Engels
Artikelnummer3501
Aantal pagina's9
TijdschriftNature Communications
Volume10
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - 1 dec 2019

    Vingerafdruk

Citeer dit