Novel fluorescent security marker. Part I: morphological and optical properties of 2-amino-6-ethoxy-4-[4-(4- morpholinyl)phenyl]-3,5-pyridinedicarbonitrile nanoparticles
| Autor: | Houssni El-Saied, L. Ferrari, F. R. Bertani, Andrea Gnoli, S. Selci, M. De Spirito, Altaf H. Basta, Mauro Missori, Adel S. Girgis |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Sonochemical synthesis of nanoparticles
Materials science Fluorescent nanoparticles Sonication fluorescent nanoparticles Nanoparticle Bioengineering Nanotechnology General Chemistry Condensed Matter Physics Fluorescence Settore FIS/07 - FISICA APPLICATA (A BENI CULTURALI AMBIENTALI BIOLOGIA E MEDICINA) Atomic and Molecular Physics and Optics Light scattering Pyridine derivatives Chemical engineering Organic nanoparticles Modeling and Simulation Yield (chemistry) Alkoxy group General Materials Science Nanometre Reprecipitation method |
| Zdroj: | Journal of nanoparticle research 14 (2012): 649-1–649-12. doi:10.1007/s11051-011-0649-8 info:cnr-pdr/source/autori:M. Missori (1); M. De Spirito (2); L. Ferrari (1); S. Selci (1); A. Gnoli (1); F.R. Bertani (1); A.S. Girgis (3); H. El-Saied (4); A.H. Basta (4)/titolo:Novel fluorescent security marker. Part I: morphological and optical properties of 2-amino-6-ethoxy-4-[4-(4-morpholinyl)phenyl]-3,5-pyridinedicarbonitrile nanoparticles/doi:10.1007%2Fs11051-011-0649-8/rivista:Journal of nanoparticle research/anno:2012/pagina_da:649-1/pagina_a:649-12/intervallo_pagine:649-1–649-12/volume:14 |
| Popis: | Newly synthesized fluorescent nanoparticles of 2-amino-6-ethoxy-4-[4-(4-morpholinyl)phenyl]-3, 5-pyridinedicarbonitrile have been developed and characterized for possible applications as security marker in paper documents. Nanoparticles have been prepared by reprecipitation in water under sonication. The size and the shape of these nanoparticles, characterized by light scattering and atomic force microscopy, have been found to be highly dependent on sonication power. Typical sizes range from tens to hundreds of nanometers. Furthermore, a remarkable increase in the fluorescence yield has been observed as nanoparticles sizes decrease. Finally, all of the above features, together with the striking stability of optical and mechanical properties over the course of months, allow for straightforward applications that rely on strong and stable fluorescence such as marking important or valuable documents. |
| Databáze: | OpenAIRE |
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