Molecular design of strong single-wall carbon nanotube/polyelectrolyte multilayer composites

Mamedov, Arif A.; Kotov, Nicholas A.; Prato, Maurizio; Guldi, Dirk M.; Wicksted, James P.; Hirsch, Andreas

doi:10.1038/nmat747

Cited by 963 publications

(810 citation statements)

References 28 publications

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“…0.225 GPa). 26 The pH of solutions has been identified as a contributing factor affecting the degree of ionic crosslinking and interdiffusion of PEI/PAA, 27 and is a likely contributor to the lower modulus obtained in this study.…”

Section: Introductionmentioning

confidence: 71%

Porous Materials with Tunable Structure and Mechanical Properties via Templated Layer-by-Layer Assembly

Ziminska

Dunne

Hamilton

2016

ACS Appl. Mater. Interfaces

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The deposition of stiff and strong coatings onto porous templates offers a novel strategy for fabricating macroscale materials with controlled architectures at the micro-and nanoscale. Here, layer-by-layer assembly is utilized to fabricate nanocomposite-coated foams with highly customizable properties by depositing polymer−nanoclay coatings onto open-cell foam templates. The compressive mechanical behavior of these materials evolves in a predictable manner that is qualitatively captured by scaling laws for the mechanical properties of cellular materials. The observed and predicted properties span a remarkable range of density-stiffness space, extending from regions of very soft elastomer foams to very stiff, lightweight honeycomb and lattice materials.

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Section: Introductionmentioning

confidence: 71%

Porous Materials with Tunable Structure and Mechanical Properties via Templated Layer-by-Layer Assembly

Ziminska

Dunne

Hamilton

2016

ACS Appl. Mater. Interfaces

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“…The multilayering process is not limited to simple linear polyelectrolytes, 2 but instead almost any charged species such as colloidal particles, proteins, DNA, enzymes, and inorganic material can be multilayered with polyelectrolytes to produce multicomposite materials. [3][4][5][6][7][8] One of the many attractive features of multilayer systems is the magnitude to which their properties can be tailored by varying the conditions used to assemble the films (i.e., polymer concentration, polymer functionality, solution pH, and ionic strength). 2,[9][10][11] In particular, films prepared from weak polyelectrolytes can exhibit highly variable properties such as thickness, surface roughness, wettability, swelling behavior, and surface friction because of the influence of pH and ionic strength on the dissociation of the weakly acidic and basic functional groups on the chains.…”

Section: Introductionmentioning

confidence: 99%

Swelling Behavior of Hyaluronic Acid/Polyallylamine Hydrochloride Multilayer Films

Burke

Barrett

2005

Biomacromolecules

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The reversible swelling behavior of multilayer films containing hyaluronic acid and polyallylamine hydrochloride was investigated using in situ ellipsometry, since many of the natural functions and applied uses of hyaluronic acid are related to the extraordinary ability of this biopolymer to swell, and to respond conformationally to the local solution environment. This swelling was observed to be substantial, and depended strongly on the film thickness, the pH conditions used to prepare the films, and the swelling solution pH and ionic strength. The swelling results were also rationalized in terms of the dissociation behavior of the polyelectrolytes in the multilayer assemblies, measured by the potential, on colloidal particles. The films were found to swell by as much as 8 times their dry thickness, and the extent of film hydration was observed to depend on the thickness of the films in a nonlinear fashion. This was related to the internal structure of the films, which is dictated by the assembly pH conditions. In addition, the swelling solution pH and ionic strength influence the electrostatic environment in the films and, in turn, have a substantial effect on the overall swelling behavior.

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“…Various charged materials, such as nanotubes (Mamedov et al, 2002), organic dyes (Cooper et al, 1995), and proteins (Liu and Lin, 2006), could be used as components to prepare multilayer films with high order at nanoscale via LBL assembly. Furthermore, the LBL method is conducted in aqueous solutions under mild conditions, which retains the activities of biomolecules (Ariga et al, 2007;Yao and Hu, 2010).…”

Section: Introductionmentioning

confidence: 99%

Reagentless biosensor based on layer-by-layer assembly of functional multiwall carbon nanotubes and enzyme-mediator biocomposite

Zhou

Zhang

et al. 2011

J. Zhejiang Univ. Sci. B

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Abstract:A simple and controllable layer-by-layer (LBL) assembly method was proposed for the construction of reagentless biosensors based on electrostatic interaction between functional multiwall carbon nanotubes (MWNTs) and enzyme-mediator biocomposites. The carboxylated MWNTs were wrapped with polycations poly(allylamine hydrochloride) (PAH) and the resulting PAH-MWNTs were well dispersed and positively charged. As a water-soluble dye methylene blue (MB) could mix well with horseradish peroxidase (HRP) to form a biocompatible and negativelycharged HRP-MB biocomposite. A (PAH-MWNTs/HRP-MB) n bionanomultilayer was then prepared by electrostatic LBL assembly of PAH-MWNTs and HRP-MB on a polyelectrolyte precursor film-modified Au electrode. Due to the excellent biocompatibility of HRP-MB biocomposite and the uniform LBL assembly, the immobilized HRP could retain its natural bioactivity and MB could efficiently shuttle electrons between HRP and the electrode. The incorporation of MWNTs in the bionanomultilayer enhanced the surface coverage concentration of the electroactive enzyme and increased the catalytic current response of the electrode. The proposed biosensor displayed a fast response (2 s) to hydrogen peroxide with a low detection limit of 2.0×10 −7 mol/L (S/N=3). This work provided a versatile platform in the further development of reagentless biosensors.

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Molecular design of strong single-wall carbon nanotube/polyelectrolyte multilayer composites

Cited by 963 publications

References 28 publications

Porous Materials with Tunable Structure and Mechanical Properties via Templated Layer-by-Layer Assembly

Porous Materials with Tunable Structure and Mechanical Properties via Templated Layer-by-Layer Assembly

Swelling Behavior of Hyaluronic Acid/Polyallylamine Hydrochloride Multilayer Films

Reagentless biosensor based on layer-by-layer assembly of functional multiwall carbon nanotubes and enzyme-mediator biocomposite

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