Brief review of metal nanoclusters in block copolymer films

Ciebien, J. F.; Clay, R.T.; Sohn, B. H.; Cohen, Robert E.

doi:10.1039/a709233d

Cited by 102 publications

(84 citation statements)

References 22 publications

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“…[63][64][65] Furthermore, block copolymer self-assembly provides the potential for the ordered assembly and stabilization of nanoscale metallic objects. 18,42,44,66,67 In what are often called nanoreactor approaches to polymer-nanoparticle composites, metals can be chelated to polymers in solution before self-assembly in bulk [Scheme 2(A)] or the bulk polymer film can be treated with metallic species after self-assembly [Scheme 2(B)]. In either case, nanoparticles are subsequently generated by a method appropriate to the metal species in the film, such as thermolysis, reduction, or exposure to plasma.…”

Section: Preparation Of Ligand-functional Block Co-mentioning

confidence: 99%

“…17 Although, in the absence of influential fields, copolymer self-assembly processes result in relatively simple repeating structures without the potential for complexity available with lithographic processes, the resulting two-and threedimensional patterns can exhibit high degrees of order over macroscopic length scales and might thus be useful for simple technological applications. As the push for miniaturization has largely been driven by the needs of the computer industry for smaller electronic and magnetic materials, much research effort in this direction has been aimed at the incorporation of nanoscale aggregates of metal atoms in the form of nanoparticles, nanowires, and other nanoscale metal clusters into assemblies of block copolymers through the use of block copolymers as templates for the localization of metal species [18][19][20] or as lithographic masks. [21][22][23][24] Strategies for the preparation of such metalpolymer hybrids can be grouped into several general classes (Scheme 1): A number of reviews [18][19][20]26 and monographs 1,5 discussing metal-containing polymers have appeared since early reports of the preparation of these materials.…”

Section: Introductionmentioning

confidence: 99%

“…As the push for miniaturization has largely been driven by the needs of the computer industry for smaller electronic and magnetic materials, much research effort in this direction has been aimed at the incorporation of nanoscale aggregates of metal atoms in the form of nanoparticles, nanowires, and other nanoscale metal clusters into assemblies of block copolymers through the use of block copolymers as templates for the localization of metal species [18][19][20] or as lithographic masks. [21][22][23][24] Strategies for the preparation of such metalpolymer hybrids can be grouped into several general classes (Scheme 1): A number of reviews [18][19][20]26 and monographs 1,5 discussing metal-containing polymers have appeared since early reports of the preparation of these materials. [27][28][29][30] This highlight, therefore, focuses on ligand-functional polymer approaches to metal-block copolymer systems and serves to review recent work in this area, to discuss our own contributions, and to speculate on future research possibilities.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid metal–polymer composites from functional block copolymers

Grubbs

2005

J. Polym. Sci. A Polym. Chem.

142

102

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ABSTRACT:The combination of metals and polymers in hybrid materials is a research area of great current interest. A number of methods for controlling the positioning of metallic species within polymer matrices on the nanometer scale have been developed. This highlight focuses on the use of functional block copolymers for the localization of metal species, especially nanoparticles, on the nanometer scale through block copolymer phase segregation. Research from the author's group on the use of alkyne-functional block copolymers for the preparation of cobalt-containing materials is discussed in this context.

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Section: Preparation Of Ligand-functional Block Co-mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrid metal–polymer composites from functional block copolymers

Grubbs

2005

J. Polym. Sci. A Polym. Chem.

142

102

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“…These early works mainly focused on montmorillonite clays, material synthesis, and mechanical properties of the composites (Fukushima and Inagaki 1987;Usuki et al 1993a;Usuki et al 1995;Kojima et al 1993a;Usuki et al 1993b;Kojima et al 1993b). Other metal oxides and metal fillers in the nanometersize range in polymeric composites have also been investigated (Ciebien et al 1998;Shi et al 2004). The latter materials are used for electromagnetic shielding and flexible electrode structures (Kruisa et al 1998;Althues et al 2007).…”

Section: Polymer Nanocompositesmentioning

confidence: 99%

Industrial Applications Perspective of Nanodielectrics

Tuncer¹,

Sauers²

2009

Dielectric Polymer Nanocomposites

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The field of nanodielectrics has had a significant impact on voltage endurance characteristics of electrical insulation. Improved time-tobreakdown behavior, resulting in reduced aging of insulation, and enhanced thermal stability are of considerable importance in industrial applications. This chapter discusses several specific aspects of nanodielectrics and their role in the future of electrical insulation and dielectric sciences. IntroductionOne should not forget that power technology-high-voltage apparatus, transmission, and most electrical components-could not exist without satisfactory electrical insulation. It is a challenging task to design and optimize an electrical insulation system while energy demand, voltage levels, and operating temperatures are either increasing in conventional applications or decreasing to cryogenic temperatures in superconducting applications. In addition, these * Research sponsored by the U.S. Department of Energy-Office of Electricity Delivery and Energy Reliability, Superconductivity Program for Electric Power Systems under contract DEAC05-00OR22725 with Oak Ridge National Laboratory, managed and operated by UT-Battelle, LLC.2 electrical components and equipment sizes are becoming smaller and more compact than conventional devices, placing greater demands on the insulation. New insulation materials are expected to have better endurance and to have better reliability than their conventional counterparts. Recent developments in composite materials filled with nanometer-size particles (defined here as particles in which at least one dimension is in the range 1-100 nm) have shown some interesting results, creating a new research field in electrical insulation being referred to as nanodielectrics (Lewis 1994;Lewis 2006;Nelson and Fothergill 2004;Cao et al. 2004).A detailed description of dielectrics for high-voltage applications was provided in earlier work by Dakin (1978). In this chapter, our discussion will focus on recent developments in the field of nanodielectrics. Only solid insulation materials composed of nanoparticle-loaded polymers will be considered here. The chapter is organized as follows. Different aspects of the nanodielectrics will be considered starting with the background and challenges faced in synthesizing nanocomposites. Some of the significant advantages of the nanodielectrics and their impact on electrical insulation industry are then discussed in the context of dielectric breakdown and voltage endurance. Nanodielectric applications at high and low temperatures together with specific device/component applications are discussed as well.

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“…Fabrication of nanoparticles either by reduction or by heat treatment of metal ions in situ appears to be the most efficient way for stabilization of the metal particles. [11] Various metals like Fe, [12] Pd, [13] Cu, [14] Au, [15] Ag, [16] and Ni [17] have been encapsulated employing the in-situ generation of particles in thin polymer films. Although the fabrication of nonaggregated metal nanoparticles can be obtained in situ without using surfactants, an efficient catalytic performance cannot be achieved because of the encapsulation of catalytic particles in a polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Glycidyl‐Methacrylate‐Based Electrospun Mats and Catalytic Silver Nanoparticles

Demir

Uǧur

Gülgün

et al. 2008

Macro Chemistry & Physics

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P(AN‐GMA) and PGMA fibers coated with monodisperse silver nanoparticles have been prepared by a combination of electrospinning and electroless plating. The morphology of the electrospun fibers remains unchanged after surface hydrazination. Oxidation of hydrazine in an ammoniacal solution of AgNO3 reduces and deposits silver atoms along the fiber surface, which then coalesce to Ag particles. The size of the silver nanoparticles is varied between 20–60 nm. Since the density of the active sites for silver reduction is lower in P(AN‐GMA), a smaller particle size could be obtained. The catalytic activity of the silver nanoparticles has been confirmed.magnified image

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Brief review of metal nanoclusters in block copolymer films

Cited by 102 publications

References 22 publications

Hybrid metal–polymer composites from functional block copolymers

Hybrid metal–polymer composites from functional block copolymers

Industrial Applications Perspective of Nanodielectrics

Glycidyl‐Methacrylate‐Based Electrospun Mats and Catalytic Silver Nanoparticles

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