A simple method for the quantification of molecular decorations on silica particles

Daniel Mangos, Takashi Nakanishi, David Lewis

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    A simple, rapid quantitative approach to determining attachment density on silica nanoparticles has been demonstrated using attenuated total reflectance Fourier transform infrared spectroscopy and verified by thermogravimetric analysis. A very high attachment of approximately 5 attachments per nm 2 has been achieved through photoinduced thiol-ene click reaction of 11-bromo-1-undecene with a thiol functionalized silica nanoparticle formed from mercaptopropyltrimethoxysilane as the sole precursor. Attachment density with concentration of alkene and reaction time is shown to be highly nonlinear and appears to be limited by accessability of thiols on the surface of the particle. This method opens the opportunity to form nanoparticles with controlled functionality including multifunctional particles, which have been produced in this work.

    Original languageEnglish
    Article number015002
    Pages (from-to)015002
    Number of pages6
    JournalScience and Technology of Advanced Materials
    Volume15
    Issue number1
    DOIs
    Publication statusPublished - Feb 2014

    Keywords

    • ATR-FTIR
    • quantitative functionalization
    • silica nanoparticles
    • sol-gel
    • thiolene click chemistry

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