Title:	Tunable optical limiting in silver nanoparticle-naphthophenanthridine hybrids
Authors:	Joseph, Mary Tomson, Sharon Vadivel, Marichandran Swamynathan, K. Kumar, Sandeep Philip, Reji Anand, Benoy
Keywords:	Optical limiting Naphtophenanthridine Discotic liquid crystals Nonlinear optics Nanosecond laser
Issue Date:	14-Nov-2024
Publisher:	Elsevier B.V.
Citation:	Journal of Molecular Liquids, Vol. 416, p126503
Abstract:	Incorporation of functional nanoparticles into liquid crystals has emerged as a promising approach to create liquid crystal nanocomposites with superior opto-electronic properties. The properties of self-assembled supramolecular structures change remarkably upon the dispersion of a minute amount of metal nanoparticles in them. The effect of dispersing alkyl thiol-functionalized silver nanoparticles (Ag NP) in Naphthophenanthridine discotic liquid crystals on the nonlinear optical (NLO) properties is discussed in this work. Discotic liquid crystals (DLC) are synthesized via N-annulation of hexabutoxytriphenylene-1-amine with heptanaldehyde through the Pictet–Spengler reaction. A uniform dispersion of about 1–3 wt% Ag NPs in the columnar matrix enhances the nonlinear optical absorption, when measured under excitation by nanosecond laser pulses at 532 nm. By changing the amount of Ag NP loading, the nonlinear response of the hybrid can be tuned. These results indicate that the Ag-DLC hybrids are potential candidates for applications in NLO devices such as tunable optical limiters.
Description:	Open Access
URI:	http://hdl.handle.net/2289/8361
Alternative Location:	https://doi.org/10.1016/j.molliq.2024.126503
Copyright:	2024 Elsevier B.V.
Appears in Collections:	Research Papers (SCM)

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