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In situ formation of polymer–gold composite nanoparticles with tunable morphologies
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Bleach, Richard, Karagoz, Bunyamin, Prakash, Shyam M., Davis, Thomas P. and Boyer, Cyrille (2014) In situ formation of polymer–gold composite nanoparticles with tunable morphologies. ACS Macro Letters, Volume 3 (Number 7). pp. 591-596. doi:10.1021/mz500195u ISSN 2161-1653.
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Official URL: http://dx.doi.org/10.1021/mz500195u
Abstract
A simple and efficient route to gold–polymer nanoparticle composites is described. Our versatile synthetic route exerts facile control over polymer nanoparticle morphology, including micelles, rod-like structures, and vesicles, all easily attainable from a single polymerization taken to different monomer conversions. Specifically, poly[oligo(ethylene glycol) methacrylate]-b-poly(dimethylaminoethyl methacrylate)-b-poly(styrene) (POEGMA-b-PDMAEMA-b-PST) triblock copolymers were synthesized using a polymerization induced self-assembly (PISA) approach. Subsequently, spherical gold nanoparticles (10 nm AuNPs) were formed at the hydrophilic–hydrophobic nexus of the assembled triblock copolymer nanoaggregates by the addition of chloroauric acid (HAuCl4) followed by in situ reduction using NaBH4. After reduction, the cloudy white nanoparticle dispersions turned to a red-purple color. The gold nanoparticles that formed were stabilized by the enveloping polymeric nanostructures, neither precipitation nor agglomeration occurred. We demonstrated that we were able to tune the gold nanoparticle composition in these polymer–gold composites by varying the concentration of chloroauric acid. Morphology, particle size, molecular weight, AuNP content, and chemical structure of the polymer structures were characterized by transmittance electron microscopy (TEM), dynamic light scattering (DLS), size exclusion chromatography (SEC), thermal gravimetric analysis (TGA), and 1H NMR. Finally, the formation of the AuNPs occurred without affecting the polymer nanoparticle morphology.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
Journal or Publication Title: | ACS Macro Letters | ||||||||
Publisher: | American Chemical Society | ||||||||
ISSN: | 2161-1653 | ||||||||
Official Date: | 15 July 2014 | ||||||||
Dates: |
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Volume: | Volume 3 | ||||||||
Number: | Number 7 | ||||||||
Page Range: | pp. 591-596 | ||||||||
DOI: | 10.1021/mz500195u | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Adapted As: |
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