ToF-SIMS analysis of UV-switchable TiO₂-nanoparticle-coated paper surface

Milena Stepien, Jarkko Saarinen, Hannu Teisala, Mikko Tuominen, Mikko Aromaa, Janne Haapanen, Jurkka Kuusipalo, Jyrki M. Mäkelä, Martti Toivakka

    Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

    41 Citeringar (Scopus)


    The chemical composition of a TiO2 nanoparticle coated paper surface was analyzed using time-of-flight secondary ion mass spectrometry (ToF-SIMS) to study the interconnection between wettability and surface chemistry on the nanoscale. In this work, a superhydrophobic TiO2 surface rich in carboxyl-terminated molecules was created by a liquid flame spray process. The TiO2 nanoparticle coated paper surface can be converted by photocatalytic oxidation into a highly hydrophilic one. Interestingly, the hydrophilic surface can be converted back into a superhydrophobic surface by heat treatment. The results showed that both ultraviolet A (UVA) and oven treatment induce changes in the surface chemistry within a few nanometers of the paper surface. These findings are consistent with those from our previously reported X-ray photoelectron spectroscopy (XPS) analysis, but the ToF-SIMS analysis yields more accurate insight into the surface chemistry.
    Sidor (från-till)3780–3790
    Antal sidor11
    StatusPublicerad - 2013
    MoE-publikationstypA1 Tidskriftsartikel-refererad

    Citera det här