PAH/DAS covalently cross-linked layer-by-layer multilayers: A "nano-net" superstratum immobilizes nanoparticles and remains permeable to small molecules

Qi An*, Kun Nie, Yihe Zhang, Yue Wang, Yingmo Hu, Victoria Dutschk, Xinglong Luan

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    10 Citations (Scopus)

    Abstract

    A "nano-net" superstratum strategy is developed to stabilize layer-by-layer (LbL) films that incorporate nanoparticles. The superstratum immobilizes silica, gold, or magnetic nanoparticles and at the same time is permeable to small molecules. Unlike most strategies to stabilize LbL multilayers reported in the literature, our strategy does not directly cross-link the nanoparticles and polymers in the adjacent layer, thus circumventing the tedious processes of (surface) modification of the nanoparticles or polymers. The unique advantage of our strategy is further employed in the preparation of a model functional device, where mesoporous silica nanoparticles are held in the composite multilayers with enhanced stabilities. A model drug, methylene blue, is then loaded in large amounts due to the porous structure of the silica particles, and could be released in a delayed manner up to 55 h.

    Original languageEnglish
    Pages (from-to)6859-6865
    Number of pages7
    JournalSoft matter
    Volume11
    Issue number34
    DOIs
    Publication statusPublished - 27 Jul 2015

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