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J Colloid Interface Sci. 2006 Oct 1;302(1):142-8. Epub 2006 Jun 20.

Preparation of hollow capsule-stabilized gold nanoparticles through the encapsulation of the dendrimer.

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  • 1Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, People's Republic of China.


The narrow-dispersed dendrimer-encapsulated gold nanoparticles without agglomeration were prepared from the grafted-dendrimers on the surface of the silica microspheres, successively by complexation of the gold chloride anion with the nitrogen atom of the dendrimer and the reduction with sodium borohydride as reductant. The hollow capsule-stabilized gold nanoparticles were prepared through the encapsulation of dendrimer successively by LBL self-assembly process of polyelectrolytes with modified-silica as template and removal of the silica core by hydrofluoric acid. The size of gold nanoparticles was 2.3+/-0.8 nm. The catalytic activity of the capsule-stabilized gold nanoparticles was investigated in the reduction reaction of 4-nitrophenol to 4-aminophenol with sodium borohydride as reductant.

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