Tuning the thermal transition of poly(N-isopropylacrylamide) based core-shell composite nanoparticles

Sriya Sanyal, Lorenzo Slay, Lenore Dai

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The focus of this work is to synthesize thermo-responsive composite core-shell nanoparticles using Pickering emulsion polymerization and, more importantly, to tune the transition temperature of these nanoparticles. The synthesized polystyrene/poly(N-isopropylacrylamide) (PNIPAAm)-silica core-shell nanoparticles are temperature-sensitive with a transition near 32 °C in pure water. An increase of the N-isopropylacrylamide monomer enhances the degree of transition. In addition, the transition temperature of the composite core-shell nanoparticles can be tuned using facile approaches, such as by incorporating a crosslinker or co-monomer during the synthesis, or adding a surfactant or co-solvent to the media. The work also suggests that tunability of the transition temperature of these composite nanoparticles follows similar mechanisms as those at the macroscopic scale.

Original languageEnglish (US)
Pages (from-to)309-315
Number of pages7
JournalScience of Advanced Materials
Issue number4
StatePublished - Jul 24 2013


  • Core-shell composite nanoparticles
  • Poly(N-isopropylacrylamide)
  • Thermal responsiveness
  • Transition temperatures

ASJC Scopus subject areas

  • Materials Science(all)

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