Surface‐Grafted Gel‐Brush/Metal Nanoparticle Hybrids

Benetti, Edmondo M.; Sui, Xiaofeng; Zapotoczny, Szczepan; Vancso, Gyula J.

doi:10.1002/adfm.200902114

Cited by 64 publications

(70 citation statements)

References 44 publications

(52 reference statements)

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“…This is, to our knowledge, the fi rst time that a precise tuning of size and morphology of polymer NCs is observed by adjusting the crosslinking of a matrix template, proving the effectiveness of the approach introduced earlier for tuning the dimensional characteristics of metal NCs. [60][61][62] It is interesting to note that the increase in EGDMA crosslinker content to 30 or 50% in the matrix caused the formation of morphologically uniform polymer terraces in which no discrete assembly of P3HT could be imaged by AFM analysis (Figure 1 e and Figure S1c in the Supporting Information). To gain further information on the properties [ 22 , 57 , 58 ] These spectroscopic features confi rm the presence of P3HT crystallites in the samples.…”

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confidence: 95%

Conjugated Polymers in Cages: Templating Poly(3‐hexylthiophene) Nanocrystals by Inert Gel Matrices

2012

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Conjugated Polymers in Cages: Templating Poly(3‐hexylthiophene) Nanocrystals by Inert Gel Matrices

2012

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“…They are easily addressed, and can be used to immobilize and stabilize the NPs simultaneously with no additional stabilizers. [16][17][18][19][20][21][22] In this respect, Koenig et al [ 23 ] have shown recently that novel catalytically active surfaces can be fabricated by in situ synthesis of platinum or palladium NPs inside poly(2-vinylpyridine) (P2VP) polymer brushes. The formation process of the NPs involves two steps: fi rst, adsorption of the metal ions to the polymer brush and then reduction of the metal ions or complexes into NPs.…”

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confidence: 99%

The Distribution of Immobilized Platinum and Palladium Nanoparticles within Poly(2‐vinylpyridine) Brushes

Al‐Hussein

Koenig

Stamm

et al. 2014

Macro Chemistry & Physics

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Novel catalytic surfaces can be prepared by in situ synthesis of metal nanoparticles (NPs) inside polymer brush systems. To gain more control over the properties of these nanocatalysts, it is important to quantify their distribution inside the polymer brush and understand their formation process better. Here, measurements of the distributions of Pt and Pd NPs within poly(2-vinylpyridine) (P2VP) brushes are reported. The amount of surface accumulation and the extent of penetration of the two metal NPs into the brush layer are determined using X-ray refl ectivity measurements. Quantitative analysis of the data reveals a signifi cant difference between the distributions of the two NP species. Pd NPs exhibit higher accumulation at the surface and larger penetration depth within the brush. This difference in behavior is attributed to the different adsorption mechanisms exhibited by the two metal ions. Whereas Pt ions adsorb to the polymer brush via ionic bonds, Pd ions form complex coordination bonds. The different distributions of the NPs within the polymer brush are related to the previously investigated catalytic activity of these systems. The reported unusually high specifi c activity of Pt hybrid brushes, as compared with Pd ones, can now be explained by buried Pd NPs that do not take part in the catalytic reaction.

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“…1) [35]. Benetti et al [35] established that the size of the SN and properties of the system may be altered by varying the extent of cross-linking of poly(HEMA). The grafting of poly(HEMA) onto a glass membrane surface and subsequent immobilization of SN imparts catalytic activity in the reduction of 4-nitrophenol (4NT) [36].…”

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confidence: 98%

“…Modification of the gold surface with bifunctional initiator (HS(CH 2 ) 11 OC(O)C(CH 3 ) 2 Br) permits use of the atom transfer radical polymerization method (ATRP) for grafting a layer of the poly(2-hydroxyethyl methacrylate)(poly(HEMA)) hydrogel as an efficient adsorbent of SN and the preparation of hybrid nanosystems with high thermal and electrical conductance and enhanced strength as well as pronounced bactericidal and sensor activity (Fig. 1) [35]. Benetti et al [35] established that the size of the SN and properties of the system may be altered by varying the extent of cross-linking of poly(HEMA).…”

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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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Surface‐Grafted Gel‐Brush/Metal Nanoparticle Hybrids

Cited by 64 publications

References 44 publications

Conjugated Polymers in Cages: Templating Poly(3‐hexylthiophene) Nanocrystals by Inert Gel Matrices

Conjugated Polymers in Cages: Templating Poly(3‐hexylthiophene) Nanocrystals by Inert Gel Matrices

The Distribution of Immobilized Platinum and Palladium Nanoparticles within Poly(2‐vinylpyridine) Brushes

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

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