Silver nanoparticles dispersed within amphiphilic star-block copolymers as templates for plasmon band materials

Ishizu, Koji; Furukawa, Taiichi; Yamada, Hiroe

doi:10.1016/j.eurpolymj.2005.06.014

Cited by 23 publications

(12 citation statements)

References 13 publications

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“…Therefore, it is urgent to search the methods allowing the acquisition of nanosystems with high storage stability. Silver colloids stabilized by polymers in various solvents are extensively investigated by considering the linear and star-shaped polymers, polymer brushes, block copolymers, and even dendrimers [13-19]. However, the advantages of branched polymer matrices in comparison with their linear polymer analogs for in situ nanoparticles formation are still not clear.…”

Section: Introductionmentioning

confidence: 99%

In situ formation of silver nanoparticles in linear and branched polyelectrolyte matrices using various reducing agents

et al. 2014

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Silver nanoparticles were synthesized in linear and branched polyelectrolyte matrices using different reductants and distinct synthesis conditions. The effect of the host hydrolyzed linear polyacrylamide and star-like copolymers dextran-graft-polyacrylamide of various compactness, the nature of the reductant, and temperature were studied on in situ synthesis of silver sols. The related nanosystems were analyzed by high-resolution transmission electron microscopy and UV-vis absorption spectrophotometry. It was established that the internal structure of the polymer matrix as well as the nature of the reductant determines the process of the silver nanoparticle formation. Specifically, the branched polymer matrices were much more efficient than the linear ones for stable nanosystem preparation.

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Section: Introductionmentioning

confidence: 99%

In situ formation of silver nanoparticles in linear and branched polyelectrolyte matrices using various reducing agents

et al. 2014

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“…It is also known that its magnitude correlates to the concentration of silver nanoparticles while the peak position is related to the size of silver nanoparticles. [15][16][17][18][19][20][21]32,33 Before UV irradiation (0 min), there was weak UV absorption for PECH-g-PS/AgCF 3 SO 3 film, implying slight reduction process for silver nanoparticles without UV irradiation. After UV irradiation, however, one strong UV absorption peak centered at around 425 nm appeared, corresponding to the plasmon excitation of silver nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Templated formation of silver nanoparticles using amphiphilic poly(epichlorohydrine-g-styrene) film

et al. 2009

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This work has demonstrated that a novel amphiphilic poly(epichlorohydrine)-graft-polystyrene (PECHg-PS) copolymer at 34:66 wt% was synthesized via atom transfer radical polymerization (ATRP) of styrene using PECH as a macroinitiator. The structure of the graft copolymer was characterized by nuclear magnetic resonance ( 1 H NMR) and FTIR spectroscopy, demonstrating that the "grafting from" method using ATRP was successful. The self-assembled graft copolymer was used as a template film for the in-situ growth of silver nanoparticles from AgCF 3 SO 3 precursor under UV irradiation. The in situ formation of silver nanoparticles with 6-8 nm in average size in the solid state template film was confirmed by transmission electron microscopy (TEM), UV-visible spectroscopy and wide angle X-ray scattering (WAXS). Differential scanning calorimetry (DSC) also displayed the selective incorporation and the in situ formation of silver nanoparticles within the hydrophilic PECH domains, probably due to stronger interaction of the silvers with the ether oxygens of PECH backbone than that with hydrophobic PS side chains.

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“…A few groups have exploited the synthesis of metal nanoparticles by using amphiphilic star block copolymers as templates 48, 102, 103, 144–146. A designing principle of using star templates is that the metal ion precursors should only complex with the inner blocks of the star copolymers, which confine the formation of nanoparticles within the star interior when reducing agents are added (Figure 3A).…”

Section: Application Of Star Polymer As Unimolecular Containermentioning

confidence: 99%

“…The inner block polymer could contain pyridine groups and ethylene oxide groups, which interact with anionic precursors, such as AuCl 4 − 48, 102, 145. Alternatively, it could also be carboxylic acid groups and ethylene oxide groups, which are able to complex with cationic precursors, such as Ag + , Pd 2+ , and Pt 4+ 101, 103, 144, 146. After reduction, the stability of formed inorganic nanoparticles is expected to be dependent on the length of outer shell blocks.…”

Section: Application Of Star Polymer As Unimolecular Containermentioning

confidence: 99%

Development of Star Polymers as Unimolecular Containers for Nanomaterials

Gao

2012

Macromol. Rapid Commun.

160

152

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Star polymers containing one central core surrounded by multiple radiating arms represent an intriguing type of globular platform to be used as unimolecular containers and reactors. The core domain can encapsulate guest "cargos", whereas protective shell and chain ends can be functionalized with reactive groups and ligands. This Feature Article highlights the recent development on using core-shell structured amphiphilic star polymers as unimolecular containers for applications in drug delivery, catalysis, and template of hybrid nanomaterials. As compared with dendrimers, star polymers enjoy advantages of facile synthesis, flexible compositions, and tunable sizes, which allow them being able to carry more and multiple "cargos" within one molecule.

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Silver nanoparticles dispersed within amphiphilic star-block copolymers as templates for plasmon band materials

Cited by 23 publications

References 13 publications

In situ formation of silver nanoparticles in linear and branched polyelectrolyte matrices using various reducing agents

In situ formation of silver nanoparticles in linear and branched polyelectrolyte matrices using various reducing agents

Templated formation of silver nanoparticles using amphiphilic poly(epichlorohydrine-g-styrene) film

Development of Star Polymers as Unimolecular Containers for Nanomaterials

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