Relative parameter contributions for encapsulating silica-gold nanoshells by poly(N-isopropylacrylamide-co-acrylic acid) hydrogels
- 130 Downloads
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.
Keywordsgold nanoshell hydrogel poly (N-isopropylacrylamide) plasmon resonance
Unable to display preview. Download preview PDF.
- (6).J. H Kim and T. R. Lee,Polym. Mater. Sci. Eng.,90, 637 (2004).Google Scholar
- (17).S. Park, M. Park, P. Han, and S. Lee,J. Ind. Eng. Chem.,13, 65 (2007).Google Scholar
- (25).J. H. Kim and T. R. Lee,Intl. Conf. on Biomedical and Pharmaceutical Engineering 2006 (ICBPE 2006), p. 271–275.Google Scholar