Engineering the surface of hybrid organic–inorganic films with orthogonal grafting of oxide nanoparticles

  • Alessandra Pinna
  • Barbara Lasio
  • Davide Carboni
  • Salvatore Marceddu
  • Luca Malfatti
  • Plinio Innocenzi
Research Paper


Superparamagnetic iron oxide nanoparticles of magnetite have been grafted on the surface of a hybrid organic–inorganic film prepared using an organically modified alkoxide, 3-glycidoxypropyltrimethoxysilane, as precursor. A solventless synthesis of the hybrid films at high pH has been employed and the surface chemistry of the deposited films has been processed by controlling the aging time of the sol. The films have been characterized by FTIR, Raman and UV spectroscopy and grazing incidence X-ray diffraction. Films prepared with fresh sols have shown a mixed presence of epoxides and hydroxyls on the surface, which enabled the successful grafting of the iron oxide nanoparticles. Films from aged sols, which contain only hydroxyls, have failed to bind the iron particles but have instead shown the capability of grafting ceria nanoparticles. This method has, therefore, allowed a direct grafting of nanoparticles on the hybrid surface without any post-synthetic functionalization step. Moreover, the phase transition induced in iron oxide nanoparticles by means of a laser beam has been exploited to pattern the film surface creating different domains of magnetite and hematite.


Iron oxide nanoparticles Magnetite Hybrid materials Surface interactions 



Mr. P. Cora is gratefully acknowledged for technical support. The Sardinian Regional Government (RAS) is kindly acknowledged for funding D. Carboni through P.O.R. SARDEGNA F.S.E. 2007–2013—Obiettivo competitività regionale e occupazione, Asse IV Capitale umano, Linea di Attività l.3.1.

Supplementary material

11051_2014_2463_MOESM1_ESM.doc (2.1 mb)
Figure S1 AFM Topology Imaging of GPTMS-SPIONs 0d (a) and 6d (b); GPTMS-Ceria 0d (c) and 6d (d). (DOC 2201 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Alessandra Pinna
    • 1
  • Barbara Lasio
    • 1
  • Davide Carboni
    • 1
  • Salvatore Marceddu
    • 2
  • Luca Malfatti
    • 1
  • Plinio Innocenzi
    • 1
  1. 1.Laboratorio di Scienza dei Materiali e Nanotecnologie, LMNT-D.A.D.UUniversità di Sassari and CR-INSTMSassariItaly
  2. 2.Istituto di Scienze delle Produzioni Alimentari (ISPA), CNRSassariItaly

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