These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
Dynamic Spirals of Nanoparticles in Light-Responsive Polygonal Fields.pdf (1.68 MB)
Dynamic Spirals of Nanoparticles in Light-Responsive Polygonal Fields
Preprints are manuscripts made publicly available before they have been submitted for formal peer review and publication. They might contain new research findings or data. Preprints can be a draft or final version of an author's research but must not have been accepted for publication at the time of submission.
submitted on 16.04.2019 and posted on 19.04.2019by Tetiana Orlova, Rémi Plamont, Alexis Depauw, Nathalie Katsonis
Nanoparticles tend to aggregate in an uncontrollable fashion once integrated into soft matter and consequently, self-assembling nanoparticles into large-scale, regular, well-defined patterns remains an ongoing challenge towards the design and realization of smart hybrid materials. The patterns of nanoparticles that have been reported in liquid crystals are static so far, and this lack of responsiveness extends to assemblies of nanoparticles formed in topological singularities and other localized structures of anisotropic matter. Here, we demonstrate the realization of light-responsive spirals of gold nanoparticles, by using a templating strategy that is common in the biological world. Specifically, we use polygonal fields of liquid crystals that incorporate molecular photo-switches in their composition, as light-responsive chiral templates. We also show that light modifies the period of the dynamic spirals of nanoparticles. These results confirm that using chiral liquid crystals as dynamic templates constitutes a versatile strategy towards soft photonic nanomaterials, and we anticipate that the possibility to control the period of the nanoparticulated pattern can find potential applications in the field of plasmonic sensing.