In situ growth of Ag nanoparticles in graphene–TiO2 mesoporous films induced by hard X-ray

Luca Malfatti, Davide Carboni, Alessandra Pinna, Barbara Lasio, Benedetta Marmiroli, Plinio Innocenzi

Research output: Contribution to journalArticlepeer-review


The controlled growth of Ag nanoparticles into graphene–TiO2 mesoporous films has been triggered by hard X-ray exposure provided by a synchrotron storage ring. The kinetic process has been studied by UV–visible spectroscopy as a function of the X-ray dose and compared to the nanoparticle growth induced in a bare mesoporous titania matrix. The graphene layers act as a preferential nucleation sites, allowing a faster nucleation of the nanoparticles. Moreover, the growth of larger nanoparticles is also promoted as a function of the exposure dose. The combined bottom-up and top-down approach to fabricate nanocomposites porous films embedding both graphene and plasmonic nanoparticles is expected to be a fundamental tool for the design of new analytical platforms based on the enhancement of the Raman signals.
Original languageEnglish
Article number2
Pages (from-to)295
Number of pages302
JournalJournal of Sol-Gel Science and Technology
Issue number2
Publication statusPublished - 2016


  • graphene
  • Mesoporous films
  • lithography
  • Nanoparticles

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemistry(all)

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