Proceedings of the Polymer Society of Korea Conference (한국고분자학회:학술대회논문집)

The Polymer Society of Korea (한국고분자학회)
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The Formation of Metal Nanoparticles in pH-responsive Block Copolymers and Hydrogels

  • Anastasiadis, S.H. (Institute of Electronic Structure and Laser, Foundation for Research and Technology) ;
  • Vamvakaki, M. (Institute of Electronic Structure and Laser, Foundation for Research and Technology) ;
  • Palioura, D. (Institute of Electronic Structure and Laser, Foundation for Research and Technology) ;
  • Spyros, A. (Department of Chemistry, University of Crete)
  • Published : 2006.10.13
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Abstract

The micellization behavior and the metal-nanoparticle formation in PDEAEMA-b-PHEGMA double hydrophilic block copolymers are investigated. The hydrophobic PDEAEMA block is pH-sensitive: at low pH it can be protonated and it becomes hydrophilic, leading to molecular solubility, whereas at higher pH micelles are formed; the behavior is studied by DLS, NMR and AFM. In these micellar nanoreactors, metal nanorystals nucleate and grow upon reduction with sizes in the range of a few nm's as observed by TEM and XRD. Similarly, metal nanocrystals can be formed within pH-sensitive microgels (${\sim}250nm$ in diameter), synthesized by emulsion copolymerization of DEAEMA, which also exhibit reversible swelling properties in water by adjusting the pH.

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