Macromolecular Research

, Volume 17, Issue 5, pp 307–312

Relative parameter contributions for encapsulating silica-gold nanoshells by poly(N-isopropylacrylamide-co-acrylic acid) hydrogels

Authors

  • Min-Yim Park
    • Department of Chemical & Bio EngineeringKyungwon University
  • Sera Lim
    • Department of Chemical & Bio EngineeringKyungwon University
    • Department of Chemical & Bio EngineeringKyungwon University
  • Sang-Eun Park
    • Advanced Energy Materials Processing LaboratoryKorea Institute of Science and Technology
Article

DOI: 10.1007/BF03218867

Cite this article as:
Park, M., Lim, S., Lee, S. et al. Macromol. Res. (2009) 17: 307. doi:10.1007/BF03218867

Abstract

Core-shell hydrogel nanocomposite was fabricated by encapsulating a silica-gold nanoshell (SGNS) with poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-co-AAc) copolymer. The oleylamine-functionalized SGNS was used as a nanotemplate for the shell-layer growth of hydrogel copolymer. APS (ammonium persulfate) was used as a polymerization initiator to produce a hydrogel-encapsulated SGNS (H-SGNS). The amounts of NIPAM (N-isopropylacrylamide) monomers were optimized to reproduce the hydrogel-encapsulated SGNS. The shell-layer thickness was increased with the increase of polymerization time and no further increase in the shell-layer thickness was clearly observed over 16 h. H-SGNS exhibited the systematic changes of particle size corresponding to the variation of pH and temperature, which was originated from hydrogen-bonding interaction between PNIPAM amide groups and water, as well as electrostatic forces attributed by the ionization of carboxylic groups in acrylic acid.

Keywords

gold nanoshellhydrogelpoly (N-isopropylacrylamide)plasmon resonance
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© The Polymer Society of Korea and Springer 2009