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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 3, Iss. 11 — Nov. 1, 2013
  • pp: 1918–1924

Large-area bulk self-assembly of plasmonic nanorods in nematic liquid crystal via surface-mediated alignment

Qingkun Liu, Nan Wang, Pengxin Chen, Yuan Zhang, and Sailing He  »View Author Affiliations

Optical Materials Express, Vol. 3, Issue 11, pp. 1918-1924 (2013)

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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.

© 2013 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(230.5440) Optical devices : Polarization-selective devices
(160.4236) Materials : Nanomaterials
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Liquid Crystals

Original Manuscript: September 6, 2013
Revised Manuscript: October 7, 2013
Manuscript Accepted: October 7, 2013
Published: October 21, 2013

Qingkun Liu, Nan Wang, Pengxin Chen, Yuan Zhang, and Sailing He, "Large-area bulk self-assembly of plasmonic nanorods in nematic liquid crystal via surface-mediated alignment," Opt. Mater. Express 3, 1918-1924 (2013)

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