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Properties of novel gel particles with projections and preparations of composite particles with gold nanoparticles

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Abstract

Mono-dispersed gel particles with projections were prepared by dispersion polymerization with ethyleneglycol dimethacrylate and a polyethyleneglycol (PEG) block macro azo initiator in H2O/ethanol solutions. The effects of molecular weight of PEG blocks and polymerization conditions on the morphology and some properties were examined for the gel particles. The diameters and the extent of coagulation were different with the polymerization conditions. Relatively large specific areas and large swelling ratio with H2O were obtained, and these values were related with the polymerization conditions. By mixing the gel particles with gold nanoparticles in solutions, composite particles were formed, which were composed of gold nanoparticles adsorbed on the gel particles. Interaction between gold nanoparticles and reactive azo groups remained in the gel particles concerned for the formation of the composite particles.

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Abbreviations

EGDMA:

Ethyleneglycol dimethacrylate

PEG:

Polyethyleneglycol

PEG-MAI:

Polyethyleneglycol block macro azo initiator

D n :

Number mean particle diameter

PMMA:

Poly (methyl methacrylate)

RMI:

Monomer/PEG-MAI ratio

AGG:

Adsorption maximum of gold nanoparticles by gel particles

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Acknowledgments

A part of this study was financially supported by Naito Taisyun Science and Technology Foundation. The authors express thanks to Prof. Dr. Tsutomu Nagaoka and Dr. Hiroshi Siiki of Osaka Prefectural University for helpful discussion. The authors express thanks to Dr. Hideki Kume and Dr. Yoshito Watanabe, TRI OSAKA, for support of TEM observations and measurements of ζ potentials. The authors also express thanks to Dr. Yayoi Yoshioka and Dr. Ayako Hioki, TRI OSAKA, for helpful discussions.

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Correspondence to Masaki Kimoto.

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Kimoto, M., Sakurai, Y. & Asao, K. Properties of novel gel particles with projections and preparations of composite particles with gold nanoparticles. Colloid Polym Sci 290, 241–250 (2012). https://doi.org/10.1007/s00396-011-2541-6

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  • DOI: https://doi.org/10.1007/s00396-011-2541-6

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