2015
DOI: 10.1039/c5sm01647a
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PAH/DAS covalently cross-linked layer-by-layer multilayers: a “nano-net” superstratum immobilizes nanoparticles and remains permeable to small molecules

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 polym… Show more

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Cited by 10 publications
(5 citation statements)
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“…Multilayers containing MS were constructed using the "nano-net superstratum" strategy. 18 In brief, multilayers of PAH and MS were assembled using a layer-by-layer (LbL) technique driven by electrostatic interactions. Subsequently, covalently built (PAH/ DAS) n multilayers were constructed by irradiation of 365 nm of the (PAH/MS) n multilayers.…”
Section: Resultsmentioning
confidence: 99%
“…Multilayers containing MS were constructed using the "nano-net superstratum" strategy. 18 In brief, multilayers of PAH and MS were assembled using a layer-by-layer (LbL) technique driven by electrostatic interactions. Subsequently, covalently built (PAH/ DAS) n multilayers were constructed by irradiation of 365 nm of the (PAH/MS) n multilayers.…”
Section: Resultsmentioning
confidence: 99%
“…However, considering that the MNPs might diffuse across the film (which was not detected during the manipulation of the membranes, including during cell culture) genipin cross-linking was used to improve the stability of the multilayers decrease the void space between the layers, which in turn led to a lower diffusion across the membrane. Similar protocols were also used in LbL composite multilayers based on silica nanoparticles and polycyclic aromatic hydrocarbons (PAH) as the components …”
Section: Resultsmentioning
confidence: 99%
“…Similar protocols were also used in LbL composite multilayers based on silica nanoparticles and polycyclic aromatic hydrocarbons (PAH) as the components. 45 Figure 1B, C as well as Videos S1−S4 show the response of freestanding membranes upon application of an external magnetic field. As expected, the obtained freestanding membranes retain the magnetic properties of the nanoparticles.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
“…[19] To overcome such an instability that is detrimental to industrial and biomedical end-uses subjected to environmental changes, different covalent crosslinking approaches have been reported [20][21][22], namely via: (i) amide bond formation between complementary groups located on adjacent native PE layers via either carbodiimide chemistry, [23,24] or heating [25,26], (ii) "click" reactions between different PE layers bearing clickable side-groups [27][28][29], (iii) disulfide bond formation between different PE layers bearing thiol groups [30], (iv) imine bond formation between polyamines and bifunctional molecules [9,31,32] and finally, (v) photo-induced crosslinking between a diazido crosslinker and different layers of native PEs. [33] Considerable effort has been focused on introducing reactive groups onto PE main chains for various advanced applications. [34][35][36][37][38] Indeed, the presence of such functions would enable PEs to act as reactive substances capable of undergoing a definite chemical action on one or more desired components in a surrounding medium but not merely as inert materials.…”
Section: Introductionmentioning
confidence: 99%