Polydiacetylene-supported silica films formed at the air/water interface

Yelena Demikhovsky, Sofiya Kolusheva, Margarita Geyzer, Raz Jelinek

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Mesostructured silica films have attracted interest as potential platforms for sensing, molecular sieving, catalysis, and others. The fabrication of free-standing silica films on water, however, is challenging due to the need for scaffolding agents that would constitute effective templates. We describe the assembly of thin film at the air/water interface comprising quaternary silicates and polydiacetylene (PDA), a unique chromatic polymer forming two-dimensional conjugated networks, and the use of these films for biological sensing. PDA exhibits a dual role in the system-both as the amphiphilic matrix facilitating immobilization of the silicate colloidal units at the air/water interface and additionally a chromatic reporter that undergoes visible blue-red transitions, accompanied by fluorescence transformations, in the presence of analytes. We demonstrate the application of the silicate/PDA thin films for the detection of bacterial proliferation.

Original languageEnglish
Pages (from-to)428-434
Number of pages7
JournalJournal of Colloid and Interface Science
Issue number2
StatePublished - 15 Dec 2011


  • Bacterial sensors
  • Color sensors
  • Free-standing thin films
  • Langmuir monolayers
  • Mesostructured silica films
  • Polydiacetylene

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry


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