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Synthesis, structure and non-linear optical properties of L-argininium perrhena...
Isakov, D. V.; Gomes, E. Matos; Belsley, M.; Rodrigues, Vitor; Costa, MargaridaA new hybrid organic–inorganic non-linear optical crystalline material, L-argininium perrhenate has been synthesized. The crystal belongs to P212121 space group, has a good optical quality and high transmission in the visible and near infra-red spectral regions. L-argininium perrhenate has high birefringence and is more than four times as efficient as KDP in second harmonic generation, making it a potentially a...
High nonlinear optical anisotropy of urea nanofibers
Isakov, D. V.; Gomes, E. de Matos; Belsley, M.; Almeida, B. G.; Martins, Albino; Neves, N. M.; Reis, R. L.Nanofibers consisting of the optically nonlinear organic molecule urea embedded in both poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA) polymers were produced by the electrospinning technique. The second-harmonic generation produced by aligned fiber mats of these materials displays a strong dependence on the polarization of the incident light. In PVA-urea nanofibers the effectiveness in generating of t...
Synthesis of polymer-based triglycine sulfate nanofibres by electrospinning
Isakov, D. V.; Martins, Albino; Gomes, E. de Matos; Bdikin, Igor; Guimarães, Ana; Dekola, Tatjana; Almeida, B. G.; Neves, N. M.; Reis, R. L.In this work we present the synthesis and characterization of polyethylene oxide (PEO) based triglycine sulfate (NH2(CH2OOH)3H2S04, TGS) nanofibres obtained by electrospinning. The fibres, with typical diameters of about 190–750 nm and above several hundred micrometres in length, present the nanocrystals of TGS embedded in a polymer matrix. The obtained nanofibres were characterized by FT-IR spectroscopy and th...
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