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Synthesis and Characterization of Monodispersed Polymer/Polydiacetylene Nanocrystal Composite Particles

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Abstract:

Monodispersed polymer/polydiacetylene composite particles were synthesized by soap-free seeded emulsion polymerization of styrene and methyl methacrylate; the products were characterized by XRD, SEM, TEM, UV-visible spectroscopy, and single particle scattering spectroscopy. In the synthesis process, polydiacetylene nanocrystals were found to act as inhibitor, and consequently a relatively low concentration was necessary. Different monomers lead to the differences in reaction condition and particle morphology; the PMMA composite particles were simpler in preparation than polystyrene particles, but the latter have better spherical morphology. The composite particles were composed of polymer shells and polydiacetylene cores, which kept their crystal structure and optical properties. A high percentage of cored particles could be achieved with optimized reaction conditions where the amount of seed was sufficient and the oily oligomer by-product was suppressed.

Keywords: CORE-SHELL; EMULSION POLYMERIZATION; MONODISPERSED; NANOCRYSTAL; OPTICAL NONLINEARITY; PHOTONIC CRYSTAL; POLYDIACETYLENE; POLYSTYRENE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2005.121

Publication date: June 1, 2005

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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