Star-block copolymers as templates for the preparation of stable gold nanoparticles

Gold nanoparticles of improved stability against aggregation were prepared using poly(ethylene oxide)-block-poly(epsilon-caprolactone) (PEO-b-PCL) star-block copolymers. A five-arm star-shaped macroinitiator (PEO) was utilized for the automated parallel controlled ring-opening polymerization of epsi...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1985. - 21(2005), 17 vom: 16. Aug., Seite 7995-8000
1. Verfasser: Filali, Mariam (VerfasserIn)
Weitere Verfasser: Meier, Michael A R, Schubert, Ulrich S, Gohy, Jean-François
Format: Aufsatz
Sprache:English
Veröffentlicht: 2005
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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245 1 0 |a Star-block copolymers as templates for the preparation of stable gold nanoparticles 
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520 |a Gold nanoparticles of improved stability against aggregation were prepared using poly(ethylene oxide)-block-poly(epsilon-caprolactone) (PEO-b-PCL) star-block copolymers. A five-arm star-shaped macroinitiator (PEO) was utilized for the automated parallel controlled ring-opening polymerization of epsilon-caprolactone to prepare a series of PEO-b-PCL star-block copolymers with a constant PEO core linked to PCL blocks of variable length. The PEO core was swelled with KAuCl4 in N,N-dimethylformamide (DMF), and gold nanoparticles were subsequently obtained by reduction with NaBH4. Since the process was always templated by the same PEO core for all investigated polymers, the average dimension of the formed gold nanoparticles was in the same range for all star-block copolymers. In sharp contrast, the size distribution and long-term stability against aggregation of the gold nanoparticles dispersed in DMF were strongly dependent on the PCL block length, confirming the role of PCL blocks as stabilizing blocks for these nanoparticles 
650 4 |a Journal Article 
700 1 |a Meier, Michael A R  |e verfasserin  |4 aut 
700 1 |a Schubert, Ulrich S  |e verfasserin  |4 aut 
700 1 |a Gohy, Jean-François  |e verfasserin  |4 aut 
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