Large-area bulk self-assembly of plasmonic nanorods in nematic liquid crystal via surface-mediated alignment
2013 (English)In: Optical Materials Express, ISSN 2159-3930, Vol. 3, no 11, 1918-1924 p.Article in journal (Refereed) Published
In this paper, we introduce a novel method to organize gold nanorods (GNRs) on a large scale by means of nematic lyotropic liquid crystal (LC) and surface-induced bulk alignment. LC is unidirectionally aligned via surface-treatment, and then gets GNRs organized with a negative order parameter in bulk through elastic force. The self-assembled GNRs (with a considerable high concentration of about 6 wt%) in LC exhibit a strong polarization-dependent localized surface plasmon resonance (LSPR). Polarized optical microscopic imaging, polarization-dependent extinction and scattering spectra of LSPR are utilized to characterize the spatial orientation of GNRs. This method is compatible with the state-of-the-art LC display technique and allows for large-scale fabrication of optical metamaterials, plasmonic polarizers comprised of self-aligned anisometric nanoparticles with extremely low cost.
Place, publisher, year, edition, pages
2013. Vol. 3, no 11, 1918-1924 p.
Gold Nanorods, Phase
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-136498DOI: 10.1364/OME.3.001918ISI: 000326676000015ScopusID: 2-s2.0-84888036857OAI: oai:DiVA.org:kth-136498DiVA: diva2:677650
QC 201312102013-12-102013-12-052014-01-16Bibliographically approved