Directed Self-Assembly of Two Kinds of Nanoparticles Utilizing Monolayer Films of Diblock Copolymer Micelles

Sohn, Byeong‐Hyeok; Choi, Jeong‐Woo; Yoo, Seong Il; Yun, Sang-Hyun; Zin, Wang‐Cheol; Jung, Jin Chul; Kanehara, Masayuki; Hirata, Takuji; Teranishi, Toshiharu

doi:10.1021/ja035069w

Cited by 250 publications

(218 citation statements)

References 17 publications

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“…One approach is to directly evaporate or synthesize inorganic nanoparticles inside wellordered block polymer templates. Cohen, 85 Sohn, 86,87 Mö ller 88 and coworkers have shown that polymer/nanoparticle composites can be generated by directly reducing the metal precursors inside block copolymer templates of different morphologies. Jaeger and Lopes demonstrated that by evaporating a series of metal nanoparticles on polystyrene-block-poly(methyl methacrylate) templates, well-aligned metal wires could be obtained on the polystyrene domains after thermal treatment at 180 uC.…”

Section: Rod-type Nanoparticle Assembly At Fluid Interfacesmentioning

confidence: 99%

Self-assembly of nanoparticles at interfaces

et al. 2007

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Developments in the assembly of nanoparticles at liquid-liquid interfaces are reviewed where the assemblies can be controlled by tuning the size of the nanoparticles and the chemical characteristics of the ligands. Both synthetic and biological nanoparticles are discussed. By controlling the type of ligands, uniform and Janus-type nanoparticles can be produced where, at liquid-liquid interfaces, subsequent reactions of the ligands can be used to generate crosslinked sheets of nanoparticles at the interface that have applications including novel encapsulants, filtration devices with well-defined porosities, and controlled release materials. By controlling the size and volume fraction of the nanoparticles and the chemical nature of the ligands, nanoparticle-polymer composites can be generated where either enthalpy or entropy can be used to control the spatial distribution of the nanoparticles, thereby, producing auto-responsive materials that self-heal, self-corral assemblies of nanoparticles, or self-direct morphologies. Such systems hold great promise for generating novel optical, acoustic, electronic and magnetic materials.

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Section: Rod-type Nanoparticle Assembly At Fluid Interfacesmentioning

confidence: 99%

Self-assembly of nanoparticles at interfaces

et al. 2007

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“…[1] In the last decade, significant progress in the synthesis of nanostructured materials with controlled size and morphology has been achieved. [2,3] One-, two-, or three-dimensional (1D, 2D, 3D) suprastructures assembled from preformed nanoparticles, [4] nanorods/wires and nanotube arrays, [5] nanostructured hollow spheres, [6] and mesostructured semiconductors have been successfully prepared. [7] In past research, amphiphilic molecules have usually been used either to direct nanoparticle aggregation or to form self-assemblies as templates for the fabrication of inorganic nanostructures.…”

mentioning

confidence: 99%

Co₃O₄ Nanoboxes: Surfactant‐Templated Fabrication and Microstructure Characterization

et al. 2006

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Nanostructured materials have attracted much attention because of their unique properties and potential applications in many fields. [1] In the last decade, significant progress in the synthesis of nanostructured materials with controlled size and morphology has been achieved. [2,3] One-, two-, or three-dimensional (1D, 2D, 3D) suprastructures assembled from preformed nanoparticles, [4] nanorods/wires and nanotube arrays, [5] nanostructured hollow spheres, [6] and mesostructured semiconductors have been successfully prepared. [7] In past research, amphiphilic molecules have usually been used either to direct nanoparticle aggregation or to form self-assemblies as templates for the fabrication of inorganic nanostructures. When self-assemblies of amphiphilic molecules are used as templates, the products are structurally and morphologically diverse because of the noncovalent interactions between the template molecules, such as hydrogen bonds, electrostatic interactions, van der Waals forces, and hydrophobic interactions, which lead to diverse inorganic nanostructures. [8][9][10] Using amphiphilic molecule assemblies such as vesicles, [11] microemulsions, [12] micelles, [13] and others [14,15] as templates, a variety of hollow inorganic nanostructures, which are usually spherical, have been prepared. In this paper, cubelike Co 3 O 4 nanoboxes, whose walls are constructed of a single layer of nanocrystals, are introduced. To the best of our knowledge, the only previously observed nanoboxes were constructed of noble metals and alloys, and most recently octahedral Cu 2 O nanocages with single crystalline walls have been generated. [16] Our synthesis is based on surfactant particles formed in alcohol solution and the fabrication of Co 3 O 4 nanoboxes using the separately dispersed cubelike particles as templates, which may provide a simple route to the synthesis of metal oxide nanoboxes. As an important magnetic p-type semiconductor, the spinel Co 3 O 4 has extensive applications in, for example, heterogeneous catalysis, solid-state sensors, electrochromic devices, solar energy absorbers, and as anode materials in Li-ion rechargeable batteries. Nanostructured Co 3 O 4 , including films, tubes, fibers, rods, nanocubes, and nanoaggregates, have been prepared to modify or promote its intrinsic properties.[17] Nanoboxes whose walls are constructed of Co 3 O 4 nanocrystals may have unique and interesting properties. The nanoboxes were obtained after the dispersion of Co(NO 3 ) 2 ·6H 2 O and sodium dodecylbenzenesulfonate (SDBS) in absolute ethanol was heated at 90°C for 8 h and then at 180°C for 3 h, followed by removal of the organics. The X-ray diffraction (XRD) pattern of the product indicates the spinel Co 3 O 4 nature (see Supporting Information, Fig. S1). It is estimated from the transmission electron microscopy (TEM) images that ca. 80% of the products are nanoboxes and the remainder is irregularly aggregated Co 3 O 4 particles. The walls of the nanoboxes are composed of small nanocrystals, and the length of the nanobo...

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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%

“…Although strategies for the organization of multicomponent systems have been carried out on micrometer length scales with the aid of microcontact printing 92 and on the nanometer scale by cocrystallization of nanoparticles of different sizes, 93 few examples of the organization of distinct chemical species on the nanometer scale through the specific localization of chemical functionality have appeared in the literature. One notable effort in this direction, carried out by Sohn et al, 66 allows the preparation of twodimensional arrays of both iron and gold nanoparticles by an oxygen plasma treatment of polymer films cast from solutions containing both gold nanoparticles and PS-PVP micelles with ferric trichloride coordinated to the pyridyl units in the micellar core.…”

Section: Toward the Arrangement Of Multiple Metalsmentioning

confidence: 99%

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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Directed Self-Assembly of Two Kinds of Nanoparticles Utilizing Monolayer Films of Diblock Copolymer Micelles

Cited by 250 publications

References 17 publications

Self-assembly of nanoparticles at interfaces

Self-assembly of nanoparticles at interfaces

Co₃O₄ Nanoboxes: Surfactant‐Templated Fabrication and Microstructure Characterization

Hybrid metal–polymer composites from functional block copolymers

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Directed Self-Assembly of Two Kinds of Nanoparticles Utilizing Monolayer Films of Diblock Copolymer Micelles

Cited by 250 publications

References 17 publications

Self-assembly of nanoparticles at interfaces

Self-assembly of nanoparticles at interfaces

Co3O4 Nanoboxes: Surfactant‐Templated Fabrication and Microstructure Characterization

Hybrid metal–polymer composites from functional block copolymers

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Product

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Co₃O₄ Nanoboxes: Surfactant‐Templated Fabrication and Microstructure Characterization