On the structure of polyamidoamine dendrimer monolayers

Bliznyuk, Valery N.; Rinderspacher, Frank; Tsukruk, Vladimir V.

doi:10.1016/s0032-3861(98)00069-x

Cited by 82 publications

(71 citation statements)

References 26 publications

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“…Actually, the commercially available polyelectrolyte poly(ethyleneimine) (9) which is frequently used for ESA is highly branched, too, and is generally reported to give good ESA-films. The effect of molar mass of the polyelectrolytes on the ESA method has been rarely explored 99,130,168,230,231,381) . Observed effects on the structure of the coatings were small, even when employing e. g. poly(styrene sulfonate) (6) with degrees of polymerization ranging from 25 to 5 000 168,381) .…”

Section: Polymers Suited For Esamentioning

confidence: 99%

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Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

Bertrand

Jonas

Laschewsky³

et al. 2000

Macromol. Rapid Commun.

1,168

1,184

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A bit of historyThe key role of surfaces for many material properties as well as for many biological processes has been recognized now. Therefore, new strategies aim at the tailoring of the material's surface only -or of a thin surface layer, respectively -, while preserving the bulk properties of the underlying support. Particular emphasis has been given to the surface modification by polymers, in an attempt to extend the known versatility of polymer bulk materials to ultrathin films and coatings, and to prepare bulk-surface composite materials. The self-organization of polymers has been increasingly explored for the preparation of well-defined surfaces and interfaces in recent years, extending the use of the established methods of low molar mass compounds (for comparative reviews, see ref. 1-3)). With such techniques, polymer films are formed spontaneously on substrates, due to balanced interactions between substrate, polymer (or its precursor) and medium. Typically, very thin, often monomolecular layers are produced. Repetitive deposition steps provide a precise control over the total thickness of the coatings, in the range from a few angstroms up to the micrometer range. Moreover, the step-by-step procedures allow for a fine structuring in the third dimension. In addition to the preparation of uniform and homogeneous coatings, gratings, gradients or steps of defined height in molecular dimensions can be easily constructed.The most recent of the self-organization techniques is the alternating physisorption of oppositely charged polyelectrolytes, the so-called "layer-by-layer" method or "electrostatic self-assembly" (ESA) [3][4][5][6][7][8][9][10] . Although some early, singular studies of self-assembly by alternating adsorption of oppositely charged polyions are reported [11][12][13] , a practical method for ESA was developed Feature Article: The article presents the state-of-the-art of alternating physisorption of oppositely charged polyelectrolytes, the so-called "layer-by-layer" method or "electrostatic self-assembly" (ESA), for the preparation of thin polymer coatings. In comparison to other, more established self-organization techniques, this recent method is distinguished by its simplicity, versatility, and speed. In particular, the tendency for self-healing is unique. Emphasis is given to the role of the molecular structure of the polyelectrolytes, and to the nature of the support. Also, various parameters for the preparation of multilayer films are highlighted, which are very important due to the kinetic control of the build-up process. The structure of the resulting coatings, their quality and stability, chemical reactions in the films, and potential applications are discussed.Macromol. Rapid Commun. 21, No. 7

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Section: Polymers Suited For Esamentioning

confidence: 99%

“…Fig. 15), and to form "layers" which are much thinner than their radius of gyration 230,231,388) . Poly(lysine) was even reported to transform from the coiled to a helical conformation upon adsorption 93) , though reports are conflicting 362) .…”

Section: The Structure Of Polymer Films Made By Esamentioning

confidence: 99%

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

Bertrand

Jonas

Laschewsky³

et al. 2000

Macromol. Rapid Commun.

1,168

1,184

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“…[78][79][80][81][82] Relevant surface layers from dendrimers, which are popular, regular, highly branched polymers, have been fabricated and studied since mid-1990s. 23,[83][84][85][86][87] For instance, Xiao and coworkers have created thin films from SiCl 3 -terminated dendrons on mica. 88 Van Duijvenbode and coworkers fabricated surface layers from five generations of 1,4-diaminobutane poly(propylene imine).…”

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confidence: 99%

Assembling hyperbranched polymerics

Peleshanko¹,

Tsukruk²

2011

J Polym Sci B Polym Phys

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A condensed overview discusses the existing grafting approaches and the surface behavior of various hyperbranched polymers. We focus on the recent strategies and corresponding characterization of the resulting surface morphologies and structures with a number of relevant recent results from the authors' own research and existing literature. Some results discussed here are important for prospective applications of hyperbranched polymers in biomedical fields, for resistive coatings, tough blends, and reinforced nanocomposites are briefly summarized as well. V C 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 50: 83-100, 2012 KEYWORDS: adsorption; hyperbranched; LB films; structural characterization; surfaces INTRODUCTION This publication presents a condensed overview of the existing grafting approaches as applied to hyperbranched polymers and discusses the surface morphologies of these polymers and corresponding composites and coatings. We mostly focus on the recent strategies and corresponding characterization of the resulting surface morphologies and structures developed in the authors' group with some relevant examples from current literature. A number of relevant results are also included here especially in relation to recent developments related to novel synthetic approaches of hyperbranched molecules as well as emerging applications of hyperbranched polymers and coatings for biomedical purposes, as resistive coatings, tough blends, and reinforced nanocomposites. Some comprehensive recent reviews on highly branched polymers, which are focused mainly on synthetic aspects can be found in literature.

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“…24,25 The terminal groups of the immobilized dendrimers can be postfunctionalized easily without their loss from the surface. 24 A computer based simulation of the dendrimer monolayer formation has revealed that the high-generation dendrimers tend to flatten and spread on the surface, while the lowgeneration dendrimers, such as generation 1 (G1) or G2, retain their bulk-phase conformation, but are less immobilized.…”

Section: Resultsmentioning

confidence: 99%

“…24 The proposed model of molecular ordering assumes that they have highly deformed ellipsoidal shapes in condensed monolayers. 24,25 The coupling with PDC at the terminal end increases the diameter by ~17 Å. Therefore, the dendrimeric monolayer can provide active thiocyanate groups with the surface density of ~0.06 nmole/cm 2 .…”

Section: Resultsmentioning

confidence: 99%

Preparation of Oligonucleotide Arrays with High-Density DNA Deposition and High Hybridization Efficiency

2004

Bulletin of the Korean Chemical Society

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In DNA microarray produced by DNA-deposition technology, DNA-immobilization and -hybridization yields on a solid support are most important factors for its accuracy and sensitivity. We have developed a dendrimeric support using silylated aldehyde slides and polyamidoamine (PAMAM) dendrimers. An oligonucleotide array was prepared through a crosslinking between the dendrimeric support and an oligonucleotide. Both DNAimmobilization and -hybridization yields on the solid support increased by the modification with the dendrimers. The increase of the immobilization and hybridization efficiency seems to result from a threedimensional arrangement of the attached oligonucleotide. Therefore, our dendrimeric support may provide a simple and efficient solution to the preparation of DNA microarrays with high-density DNA-deposition and high hybridization efficiency.

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On the structure of polyamidoamine dendrimer monolayers

Cited by 82 publications

References 26 publications

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

Assembling hyperbranched polymerics

Preparation of Oligonucleotide Arrays with High-Density DNA Deposition and High Hybridization Efficiency

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