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- W2328574996 endingPage "3841" @default.
- W2328574996 startingPage "3830" @default.
- W2328574996 abstract "We demonstrated a simple and facile approach to fabricate biocompatible monodisperse hollow microparticles of controlled geometry. The hemispherical, spherical, and cubical microparticles are obtained by drying multilayer capsules of hydrogen-bonded poly(N-vinylpyrrolidone)/tannic acid (PVPON/TA)n. Drying spherical capsules results in hemispherical particles if 15 < n < 20. This shape transformation is controlled by capsule stiffness, which is regulated by the layer number, capsule diameter, and PVPON molecular weight. Cubical and spherical hollow particles maintaining their three-dimensional shapes in the dry state are obtained if n ≥ 25.5. A 17-fold stiffness increase is required to lead from totally collapsed (PVPON/TA)5.5 to dried self-supporting (PVPON/TA)25.5 particles of 2 μm in dimensions. All hollow particles could be further resuspended in aqueous solutions while retaining their shapes upon rehydration. The cell growth and viability studies using human cancer cells revealed noncytotoxic properties of the (PVPON/TA) multilayer particles. Both spherical and hemispherical capsules were internalized by macrophages with the uptake of the hemispherical particles per cell two times more efficient. The method presented here allows for a robust preparation of biocompatible shaped particles whose shape and dimensions can be easily tuned by controlling capsule size and wall thickness. The reported structures can be potentially useful for biomedical applications such as shape-controlled cellular uptake and flow dynamics." @default.
- W2328574996 created "2016-06-24" @default.
- W2328574996 creator A5000531974 @default.
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- W2328574996 creator A5058997353 @default.
- W2328574996 creator A5070809986 @default.
- W2328574996 creator A5082857859 @default.
- W2328574996 date "2013-10-07" @default.
- W2328574996 modified "2023-10-17" @default.
- W2328574996 title "Biocompatible Shaped Particles from Dried Multilayer Polymer Capsules" @default.
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