Ionic Strength Responsive Sulfonated Polystyrene Opals

Luca Nucara, Vincenzo Piazza, Francesco Greco, Valentina Robbiano, Valentina Cappello, Mauro Gemmi, Franco Cacialli, Virgilio Mattoli

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Stimuli-responsive photonic crystals (PCs) represent an intriguing class of smart materials very promising for sensing applications. Here, selective ionic strength responsive polymeric PCs are reported. They are easily fabricated by partial sulfonation of polystyrene opals, without using toxic or expensive monomers and etching steps. The color of the resulting hydrogel-like ordered structures can be continuously shifted over the entire visible range (405-760 nm) by changing the content of ions over an extremely wide range of concentration (from about 70 μM to 4 M). The optical response is completely independent from pH and temperature, and the initial color can be fully recovered by washing the sulfonated opals with pure water. These new smart photonic materials could find important applications as ionic strength sensors for environmental monitoring as well as for healthcare screening.

Original languageEnglish
Pages (from-to)4818-4827
Number of pages10
JournalACS Applied Materials and Interfaces
Volume9
Issue number5
DOIs
Publication statusPublished - 2017 Feb 8
Externally publishedYes

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Keywords

  • colloids
  • core-shell particles
  • ionic strength sensors
  • polyelectrolytes
  • stimuli-responsive opals

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Nucara, L., Piazza, V., Greco, F., Robbiano, V., Cappello, V., Gemmi, M., Cacialli, F., & Mattoli, V. (2017). Ionic Strength Responsive Sulfonated Polystyrene Opals. ACS Applied Materials and Interfaces, 9(5), 4818-4827. https://doi.org/10.1021/acsami.6b14455