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Differences of Internal Structures Between Amphiphilic and Hydrophobic Block-Copolymer Nanoparticles

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In this report, we show a novel and simple preparation method for obtaining block-copolymer nanoparticles. Regular-sized polymer nanoparticles are formed after evaporation of a good solvent from a polymer solution containing a non-volatile poor solvent and the volatile good solvent. Nanoparticles of poly(styrene-b-sodium acrylate), poly(styrene-b-4-vinylpyridine), and poly(styrene-b-isoprene) were prepared by using this method. We also discuss the difference of internal structures between amphiphilic and hydrophobic block-copolymer nanoparticles. From the results of scanning transmission electron microscope (STEM) imaging, the particles of amphiphilic block-copolymers have hollow structures were observed. On the other hand, the particles of a hydrophobic block-copolymer form lamellar micro-phase separation structures.
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Document Type: Research Article

Publication date: 2007-03-01

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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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