Macromolecular Research

, Volume 17, Issue 5, pp 307–312 | Cite as

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

  • Min-Yim Park
  • Sera Lim
  • Sang-Wha Lee
  • Sang-Eun Park
Article

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 nanoshell hydrogel poly (N-isopropylacrylamide) plasmon resonance 

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Copyright information

© The Polymer Society of Korea and Springer 2009

Authors and Affiliations

  • Min-Yim Park
    • 1
  • Sera Lim
    • 1
  • Sang-Wha Lee
    • 1
  • Sang-Eun Park
    • 2
  1. 1.Department of Chemical & Bio EngineeringKyungwon UniversityGyeonggi-doKorea
  2. 2.Advanced Energy Materials Processing LaboratoryKorea Institute of Science and TechnologySeoulKorea

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