Porous Silicon Films Micropatterned with Bioelements as Supports for Mammalian Cells

Martin Sweetman, Maurizio Ronci, Soraya Rasi Ghaemi, Jamie Craig, Nicolas Voelcker

    Research output: Contribution to journalArticle

    35 Citations (Scopus)

    Abstract

    Porous silicon (pSi) surfaces have been chemically patterned via a UV initiated hydrosilylation reaction of an alkene through a photomask, introducing chemical functionality in the exposed surface areas. A secondary, UV initiated hydrosilylation reaction with a second alkene of different functionality is performed to backfill the silicon hydride terminated regions on the surface, thereby affording patterned porous films with dual, surface chemistry. UV initiated hydrosilylations were performed using the alkene undecylenic acid N-hydroxysuccinimide (NHS) ester, and the pSi surfaces were stabilized by a second hydrosilylation reaction with a polyethylene glycol (PEG) appended alkene. NHS ester and PEG functionalized surfaces were used for the selective immobilization of the cell adhesion mediator protein fibronectin (FN), in the NHS-functional regions. Matrix-assisted laser desorption/ionization mass spectrometry imaging on the protein functionalized pSi surface confirmed the patterned conjugation of the FN to the NHS functionalized regions. Mammalian cells cultured on these surfaces showed attachment that was confined to the patterned areas of FN on the pSi surface.

    Original languageEnglish
    Pages (from-to)1158-1166
    Number of pages9
    JournalAdvanced Functional Materials
    Volume22
    Issue number6
    DOIs
    Publication statusPublished - 2012

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