Sensory Response and Two-Photon-Fluorescence Study of Regioregular Polythiophene Nanoparticles |
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| Authors: | Soumitra Satapathi Lian Li Robinson Anandakathir Lynne A Samuelson Jayant Kumar |
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| Institution: | 1. Center for Advanced Materials , University of Massachusetts Lowell , Lowell, Massachusetts;2. Department of Physics , University of Massachusetts Lowell , Lowell, Massachusetts;3. US Army Natick Soldier Research , Development &4. Engineering Center , Natick, Massachusetts |
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| Abstract: | Nanoparticles of a regioregular and soluble polythiophene were fabricated by mini-emulsion technique. The fabricated nanoparticles were characterized by optical spectroscopy and dynamic light scattering. The fluorescence quenching of these fabricated nanoparticles with 2,4-dinitrotolune (DNT) in aqueous and organic solutions was investigated. Significant fluorescence quenching was observed. The Stern-Volmer constants were determined to be higher than that of the bulk polymer in solution, indicating that the nanoparticles provide better sensitivity in DNT sensing. Strong two-photon-induced fluorescence was measured from these nanoparticles. |
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| Keywords: | Polythiophene sensor nitroaromatic compounds two-photon-induced fluorescence |
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