Self Assembly and Optical Properties of Dendrimer Nanocomposite Multilayers

Redmond, Shawn M.; Balogh, Péter; Tang, Houxiang; Martin, David C.; Rand, Stephen C.

doi:10.1002/mabi.200700114

Cited by 9 publications

(4 citation statements)

References 49 publications

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“…Hence, we anticipate a significant binding of PAMAM dendrimer to PMMA surface with a negligible influence of acid/alkali pretreatment process on PAMAM binding. Here, the potential interaction of amine groups on PAMAM dendrimers with the residual hydroxyl groups on PMMA surface before pretreatment itself and subsequent formation of hydrogen bonds and/or electrostatic interaction could be attributed as a possible reason for these observations . The interaction of PAMAM dendrimer to bare PMMA surface was sufficiently strong enough to withstand repeated washing steps with DI water.…”

Section: Resultsmentioning

confidence: 87%

“…Here, the potential interaction of amine groups on PAMAM dendrimers with the residual hydroxyl groups on PMMA surface before pretreatment itself and subsequent formation of hydrogen bonds and/or electrostatic interaction could be attributed as a possible reason for these observations. [35,36] The interaction of PAMAM dendrimer to bare PMMA surface was sufficiently strong enough to withstand repeated washing steps with DI water. These results suggest that PAMAM dendrimers binds firmly to the PMMA surface.…”

Section: Characterization Of Binding Of G4 Pamam Dendrimer To Pmma Sumentioning

confidence: 99%

See 1 more Smart Citation

Self‐Assembled Polyamidoamine Dendrimer on Poly (methyl meth‐ acrylate) for Plasmonic Fiber Optic Sensors

Divagar

Jain

Satija³

et al. 2019

ChemNanoMat

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We report a novel one‐step polyamidoamine (PAMAM) dendrimer based polymethyl methacrylate (PMMA) surface functionalization strategy for the development of polymeric optical fiber (POF) based plasmonic sensors utilizing gold nanoparticles (AuNP). Simple contact angle measurements over PMMA sheets reveal the ability of the dendrimers to strongly bind to PMMA surface without additional acid/alkali pretreatment, unlike the conventional hexamethylene diamine (HMDA) based surface modification. Subsequently, U‐bent POF probes with high evanescent wave absorbance sensitivity were exploited for relative quantification of the surface amine groups using fluorescein isothiocyanate (FITC) binding and efficient chemisorption of gold nanoparticles (AuNP) in order to identify the optimum conditions viz. dendrimer concentration, incubation time and dendrimer generation. While FITC binding showed a proportional increase in amine functional density with PAMAM concentration and time, interestingly the AuNP (40 nm) binding studies revealed the formation of loose PAMAM multilayers and their desorption. PAMAM (G4) concentration as low as 5 mM and incubation time of 24 h provide faster binding rate with densely packed AuNP and the RI sensitivity of ∼15 (A546 nm/RIU). This simpler and inexpensive strategy could also be exploited for the development of functional PMMA substrates for various applications including nanotechnology, bio‐imaging, drug delivery and analytical separations.

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Section: Resultsmentioning

confidence: 87%

Section: Characterization Of Binding Of G4 Pamam Dendrimer To Pmma Sumentioning

confidence: 99%

Self‐Assembled Polyamidoamine Dendrimer on Poly (methyl meth‐ acrylate) for Plasmonic Fiber Optic Sensors

Divagar

Jain

Satija³

et al. 2019

ChemNanoMat

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“…In the case of a large excess of Ag + ions or the use of PAdAm, the structure of which is conducive to localization of the nitrogen-containing groups on the outer surface of the globules, the kinetic control of SN diminishes, leading to the formation of nanohybrids with polydispersed SN with diameter 30-200 nm [121]. The protonation of the NH 2 groups dependent on the pH of the medium and reactive additives to such systems are capable of altering the morphology of the nanodispersed metallic phase [123].…”

Section: Hybrid Systems With An Organic Polymer Matrixmentioning

confidence: 98%

Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles

Tolstov

2015

Theor Exp Chem

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The major methods for the preparation of silver-containing polymer composite nanosystems and the formation of their hybrid structure are examined. Special attention is focused on a new class of silver-containing hybrid systems, namely, organic-inorganic coordination polymers, obtained by the self-assembly of silver complexes. The effect of intercomponent interaction on the structure and properties of these hybrid composites was examined.The creation of new improved materials is an important goal of modern chemistry and materials science. Polymer composites with hybrid structure are among such materials and hold interest since they display a combination of properties characteristic for each of the inorganic and organic components [1-3] and, in some cases, unique properties related to the specific nature of their structure [4]. From a modern viewpoint, hybrid organic-inorganic materials are formed by the combination of components, differing in their chemical nature, on a molecular or nano level through formation of chemical bonds ((non)covalent bonds, hydrogen bonding, and donor-acceptor bonds) or weaker physical bonds (van der Waals and electrostatic interactions) [5]. Special attention is given to the stability of the nanodispersed components due to interaction between the nanophase and various stabilizers [6]. The interest in silver-containing hybrid polymer composite materials, including nanocomposites, which, by their very nature, are a priori hybrid systems, is attributed to a set of properties of the matrix itself, which often possesses hybrid structure, properties of silver in ionic and nanodispersed forms, and new properties related to the appearance of hybrid silver-polymer structures [7,8]. Special interest is presently found in bionanocomposites derived from biopolymers and silver nanoparticles (SN), which display specific physicochemical properties, in particular, electrochemical, photochemical, and catalytic properties highly dependent on the dimensions and polydispersion of the nanophase [9, 10] as well as biological activity due to the ionization of the metal atoms in the presence of H 2 O/O 2 and the interaction between the SN surface and functional groups of the various biomolecules [11].In light of the important role of the polymer matrix in formation of the major structural characteristics and properties of silver-containing hybrid systems, we should classify these materials according to their chemical structure.Composites with Silver Nanoparticles (SN) Dispersed in a Polymer Matrix with Hybrid Structure. The major distinguishing feature of such materials is the prior synthesis of the hybrid polymer matrix obtained due to the formation of chemical bonds between the organic and inorganic components with subsequent introduction of SN into the system. The synthesis of the SN may be either in situ or ex situ. 740040-5760/15/5102-0074

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“…Several research groups [41][42][43] have conducted theoretical and experimental studies of these ion-permselective membranes. Martin and co-workers [44][45][46][47][48] reported a pH-responsive transport membrane system consisting of gold nanotubules capable of altering between cationtransporting, non-ion-permselective, and anion-transporting states. This multi-bipolar architecture makes polyelectrolyte multilayer membranes especially suitable for ion separations.…”

Section: Effect Of Ph and Charge On The Permeability Of Pem Filmsmentioning

confidence: 98%

Modulating the release kinetics through the control of the permeability of the layer-by-layer assembly: a review

Mansouri¹,

Winnik²,

Tabrizian³

2009

Expert Opinion on Drug Delivery

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The layer-by-layer (LbL) self-assembly technique has emerged as a simple and versatile method for coating biological and non-biological templates for various biomedical applications. A promising avenue of this technique lies in the encapsulation of drugs and other biological substances for controlled release. Fundamental studies of LbL assembly on flat surfaces have provided a sound understanding of film deposition theory and its pertinence to ionic and molecular transport and diffusion through polyelectrolyte multilayer (PEM) films. However, there is a lack of information on the permeability of three-dimensional PEM shell systems. In either PEM films or shells, it has been shown that drug release is a function of the ionic strength, pH and/or multilayer thickness. This report aims to provide an overview of the physicochemical parameters affecting the permeability of two- and three-dimensional multilayer shells, including ionic strength, layer number and pH. Furthermore, their synergic effect on loading and release of biologically active molecules from LbL multilayers are discussed.

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Self Assembly and Optical Properties of Dendrimer Nanocomposite Multilayers

Cited by 9 publications

References 49 publications

Self‐Assembled Polyamidoamine Dendrimer on Poly (methyl meth‐ acrylate) for Plasmonic Fiber Optic Sensors

Self‐Assembled Polyamidoamine Dendrimer on Poly (methyl meth‐ acrylate) for Plasmonic Fiber Optic Sensors

Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles

Modulating the release kinetics through the control of the permeability of the layer-by-layer assembly: a review

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