2011
DOI: 10.3762/bjnano.2.84
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Approaches to nanostructure control and functionalizations of polymer@silica hybrid nanograss generated by biomimetic silica mineralization on a self-assembled polyamine layer

Abstract: SummaryWe report the rational control of the nanostructure and surface morphology of a polyamine@silica nanoribbon-based hybrid nanograss film, which was generated by performing a biomimetic silica mineralization reaction on a nanostructured linear polyethyleneimine (LPEI) layer preorganized on the inner wall of a glass tube. We found that the film thickness, size and density of the nanoribbons and the aggregation/orientation of the nanoribbons in the film were facile to tune by simple adjustment of the biomim… Show more

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Cited by 6 publications
(6 citation statements)
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“…This deviation from regular crystalline structure at the film interface may have important consequences for the reactivity and interactions of LPEI throughout its broad range of utilization. For example, a promising recent application of LPEI has explored biomimetic synthesis and nanosurface functionalization of LPEI “nanograss” on silica surfaces in biologically relevant conditions . The unique structural behavior of LPEI is leveraged to generate ordered self-assembled nanostructures in solution without the stringent deposition conditions that are required to generate high-quality self-assembled monolayers from siloxanes on silica substrates.…”
Section: Discussionmentioning
confidence: 99%
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“…This deviation from regular crystalline structure at the film interface may have important consequences for the reactivity and interactions of LPEI throughout its broad range of utilization. For example, a promising recent application of LPEI has explored biomimetic synthesis and nanosurface functionalization of LPEI “nanograss” on silica surfaces in biologically relevant conditions . The unique structural behavior of LPEI is leveraged to generate ordered self-assembled nanostructures in solution without the stringent deposition conditions that are required to generate high-quality self-assembled monolayers from siloxanes on silica substrates.…”
Section: Discussionmentioning
confidence: 99%
“…For example, a promising recent application of LPEI has explored biomimetic synthesis and nanosurface functionalization of LPEI "nanograss" on silica surfaces in biologically relevant conditions. 87 The unique structural behavior of LPEI is leveraged to generate ordered selfassembled nanostructures in solution without the stringent deposition conditions that are required to generate high-quality self-assembled monolayers from siloxanes on silica substrates. This presents an intriguing alternative to traditional aminebearing SAMs on silica, which are notoriously difficult to generate with optimum quality.…”
Section: ■ Conclusionmentioning
confidence: 99%
“…A considerable number of factors can influence the shape of the primary LPEI aggregates and, consequently, the morphology of the mineralized silica particles. This can be realized by varying the LPEI and/or silica precursor concentration, timespan of silicification [ 19 ], media modulation (i.e., partial replacement of water by methanol or other solvents) [ 20 ], pH value [ 21 ], or by introducing acidic and basic additives that can interact with LPEI [ 22 ] and other proton donors [ 23 ]. Further modification of the silica morphology can be achieved by adding metal ions that form complexes with the secondary amine groups of LPEI [ 24 26 ].…”
Section: Introductionmentioning
confidence: 99%
“…The second possibility can be fulfilled for instance by introducing a titania precursor in the mineralization process. A silica/titania mixture is able to catalyze liquid phase epoxidation [ 35 ], the NO x abatement under UV irradiation [ 36 ] or the photocatalytic decomposition of low-surface-energy organic components attached to the nanostructured surface [ 19 ].…”
Section: Introductionmentioning
confidence: 99%
“…In contrast, the cationic polymers, polyethylenimine (PEIs), are regarded as the most efficient and versatile non-viral vectors [20]. Of these, linear PEI (LPEI) has been widely employed in gene transfer into varied organs [21], such as lung, brain, retina, pancreas, and bladder tumors [2225]. Clinical trials for the treatment of bladder cancer and human immunodeficiency virus (HIV) infection have been underway, using LPEI-mediated plasmid DNA delivery [26].…”
Section: Introductionmentioning
confidence: 99%