A Comparative Study on Morphological and Optical Properties of Pure and Oleic Acid Added Organic Nanocrystal of DAST Embedded in PVA Matrix for NLO Applications
Keywords:
Organic nanocrystals, functional groups, optical absorption, morphology, compositeAbstract
Organic nanocrystals exhibit enhanced nonlinear optical (NLO) properties over the bulk crystals of those organic molecules. In this article, an attempt has been made to prepare organic nanocrystal of DAST via two different approaches. In the first case, the synthesis of nanocrystal was explored via a cost effective and low temperature solvothermal method. In the second case, the DAST nanocrystal/PVA and oleic acid assisted DAST nanocrystal/PVA composite films were prepared in order to combine the enhanced nonlinear optical properties of the organic nanocrystalline material with flexible polymers. The structure and morphology of as-prepared DAST nanocrystal embedded in PVA matrixwere analyzed using powder XRD and scanning electron microscope (SEM). Fourier transform infrared (FT-IR) analysis confirms the presence of various functional groups. The optical property of the DAST/PVA composites was characterized by UV-Vis absorption spectrum. The addition of oleic acid significantly alters the crystal growth process of DAST nanocrystal, resulting in the generation and stabilization of regular nanosized DAST nanorods.
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