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Thermo-responsive PNIPAm nanopillars displaying amplified responsiveness through the incorporation of nanoparticles

AuthorsGiussi, Juan M.; Von Bilderling, Catalina; Alarcón, Emiliano; Pietrasanta, Lía I.; Hernández, Rebeca ; Pérez del Real, Rafael ; Vázquez Villalabeitia, Manuel ; Mijangos, Carmen ; Cortez, M. Lorena; Azzaroni, O.
Issue Date2018
PublisherRoyal Society of Chemistry (UK)
CitationNanoscale 10: 1189-1195 (2018)
AbstractThe possibility of combining more than one stimulus-responsive property into a single material holds interesting potential for the creation of adaptive devices to be used in diverse fields such as drug delivery, nanomedicine and tissue engineering. This paper describes a novel material based on thermo-responsive PNIPAm nanopillars with amplified surface properties through the incorporation of FeO nanoparticles. The incorporation of magnetic nanoparticles into the nanopillars, prepared via surface-initiated atom-transfer radical polymerization in anodized aluminum oxide templates, sharply increased their stiffness and hydrophobicity when increasing the temperature above the volume phase transition temperature. Furthermore, their magnetic response turned out to be proportional to the amount of the incorporated nanoparticles. The possibility of sharply increasing the stiffness with a temperature variation close to the human body temperature paves the way to the application of these substrates as >smart> scaffolds for cell culture. Additionally, the presence of superparamagnetic nanoparticles in the nanopillars offers the possibility of using these nanostructured systems for magnetic hyperthermia.
Publisher version (URL)htt://dx.doi.org/10.1039/c7nr06209e
Identifiersdoi: 10.1039/c7nr06209e
issn: 2040-3364
e-issn: 2040-3372
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