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Synthesis of Core-Shell Gold Nanoparticles with Maltose-Modified Poly(Ethyleneimine)

Synthesis of Core-Shell Gold Nanoparticles with Maltose-Modified Poly(Ethyleneimine)

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KÖTH, Anja, Brigitte TIERSCH, Dietmar APPELHANS, Michael GRADZIELSKI, Helmut CÖLFEN, Joachim KOETZ, 2012. Synthesis of Core-Shell Gold Nanoparticles with Maltose-Modified Poly(Ethyleneimine). In: Journal of Dispersion Science and Technology. 33(1), pp. 52-60. ISSN 0193-2691. eISSN 1532-2351

@article{Koth2012Synth-22626, title={Synthesis of Core-Shell Gold Nanoparticles with Maltose-Modified Poly(Ethyleneimine)}, year={2012}, doi={10.1080/01932691.2010.530084}, number={1}, volume={33}, issn={0193-2691}, journal={Journal of Dispersion Science and Technology}, pages={52--60}, author={Köth, Anja and Tiersch, Brigitte and Appelhans, Dietmar and Gradzielski, Michael and Cölfen, Helmut and Koetz, Joachim} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/22626"> <dcterms:issued>2012</dcterms:issued> <dcterms:title>Synthesis of Core-Shell Gold Nanoparticles with Maltose-Modified Poly(Ethyleneimine)</dcterms:title> <dcterms:abstract xml:lang="eng">The synthesis of ultrafine gold nanoparticles in presence of maltose-modified hyperbranched poly(ethyleneimines) (PEI) is described. The polymer acted as both a reducing and stabilising agent in the particle formation process. The nanoparticles were characterized by means of dynamic light scattering (DLS), transmission electron microscopy (TEM), analytical ultracentrifugation (AUC), small-angle x-ray scattering (SAXS), and small-angle neutron scattering (SANS). The mechanism of nanoparticle formation can be described in two steps. The reduction process of the Au3+ ions located in the inner coil region of the hyperbranched PEI led to the formation of a compact gold core, and is accompanied by a collapse of the polymer coil. Therefore, in the subsequent reduction process a gold-polymer hybrid shell is formed. By using the PEI of higher molar mass, core-shell gold nanoparticles of about 3.6 nm size with a more narrow size distribution and special fluorescence behavior could be synthesized.</dcterms:abstract> <dc:contributor>Koetz, Joachim</dc:contributor> <dc:creator>Tiersch, Brigitte</dc:creator> <dc:contributor>Appelhans, Dietmar</dc:contributor> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/22626"/> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103605204-4002607-1"/> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-04-24T19:45:15Z</dcterms:available> <dc:creator>Köth, Anja</dc:creator> <dc:creator>Koetz, Joachim</dc:creator> <dc:rights>deposit-license</dc:rights> <dc:contributor>Tiersch, Brigitte</dc:contributor> <dc:creator>Appelhans, Dietmar</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-04-24T19:45:15Z</dc:date> <dc:contributor>Köth, Anja</dc:contributor> <dc:language>eng</dc:language> <dc:contributor>Gradzielski, Michael</dc:contributor> <dc:creator>Gradzielski, Michael</dc:creator> <dc:contributor>Cölfen, Helmut</dc:contributor> <dcterms:bibliographicCitation>Journal of Dispersion Science and Technology ; 33 (2012), 1. - S. 52-60</dcterms:bibliographicCitation> <dc:creator>Cölfen, Helmut</dc:creator> </rdf:Description> </rdf:RDF>

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