Metallized Polyelectrolyte Microcapsules

Shchukin, Dmitry; Ustinovich, Elena Stepanovna; Sukhorukov, Gleb B.; Möhwald, Helmuth; Свиридов, Д. В.

doi:10.1002/adma.200401031

Cited by 62 publications

(39 citation statements)

References 49 publications

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“…For example, Shchukin et al have used a "photocatalytic" approach to fabricate hollow metal microspheres based on the spatially confined metallization of the shell or interior of the LbL microcapsules. [65] As shown in Figure 4, the metal nanoparticles that are encapsulated in the shells prevent the collapse of the shells after drying, thereby producing stable, spherical microcapsules with a predetermined size of about 2 lm.…”

Section: Hollow Lbl Microcapsulesmentioning

confidence: 99%

Freestanding Nanostructures via Layer‐by‐Layer Assembly

2006

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Freestanding flexible nanocomposite structures fabricated by layer‐by‐layer (LbL) assembly are promising candidates for many potential applications, such as in the fields of thermomechanical sensing, controlled release, optical detection, and drug delivery. In this article, we review recent advances in the fabrication and characterization of different types of freestanding LbL structures in air and at air/liquid and liquid/liquid interfaces, including micro‐ and nanocapsules, microcantilevers, freely suspended membranes, encapsulated nanoparticle arrays, and sealed‐cavity arrays. Several recently developed fabrication techniques, such as spin‐assisted coating, dipping, and micropatterning, make the assembly process more efficient and impart novel physical properties to the freestanding films.

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Section: Hollow Lbl Microcapsulesmentioning

confidence: 99%

Freestanding Nanostructures via Layer‐by‐Layer Assembly

2006

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“…The formation of a separation layer due to sorption of inorganic compounds at a surface of spherical polymeric globules is used more rarely [4]. Preparation of porous and hollow ceramic particles can be based on sol-gel technology frequently used in combination with the emulsion method [5][6][7][8][9][10][11]13]. During the synthesis particular attention should be focused on a choice of conditions appropriate to control changes in the form, size and some other characteristics of hollow particles prepared from different materials.…”

Section: Synthesis Methodology Of Hollow Spherical Nano-and Micropartmentioning

confidence: 99%

Synthesis and Characterisation of Hollow Spherical Nano- and Microparticles with Silica and Magnetite

Горбик

Dubrovin

Demchenko

2009

Nanomaterials and Supramolecular Structures

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The main principles and methods of synthesis of hollow structures with inorganic nanomaterials are described. Synthesis of hollow spherical silica particles was based on hydrolysis of Si(CH 3 ) 2 Cl 2 and SiCl 4 in nonpolar solvents at a surface of aerosol drops. To synthesise hollow magnetite nano-and microparticles with magnetite, saturated solution of iron chlorides in acetone was used. Phase and element composition, morphology and structure of samples were studied using XRD, Auger electron spectroscopy, scanning electron and atom force microscopies.

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“…Such structures have high photochemical antibacterial activity [173]. The TiO 2 /Rh 0 nanocomposites [144] synthesized in the same way are active in the photocatalytic oxidation of benzene, and modification of the surface of the photocatalyst with rhodium prevents its carbonization during the reaction.…”

Section: Photocatalytic Formation Of Metal-containing Nanoheterostrucmentioning

confidence: 99%

“…Microcrystalline and nanocrystalline oxide semiconductors can provide the basis for the photocatalytic formation of a wide range of metal-semiconductor nanostructures, such as TiO 2 /Pt 0 , TiO 2 /Pd 0 [119,144,145], TiO 2 /Rh 0 [146], TiO 2 /Au 0 [119,[147][148][149][150][151][152][153][154][155][156][157], TiO 2 /Ag 0 [131,150,155,, TiO 2 /Cu 0 [106,107,[181][182][183][184][185][186][187], TiO 2 /Hg 0 [181], TiO 2 /Ni 0 [188], TiO 2 /Cd 0 [189,190], TiO 2 /Zn 0 , TiO 2 /Mn 0 , TiO 2 /Tl 0 [190], ZnO/Au 0 [148], ZnO/Ag 0 [191,192], ZnO/Cu 0 [109,192,193], ZnO/Pd 0 [194], and ZnO/Pt 0 [126,192,195]. Features of the photoinduced production of metal-semiconductor nanostructures were investigated [196][197]…”

Section: Photocatalytic Formation Of Metal-containing Nanoheterostrucmentioning

confidence: 99%

Photochemical formation of semiconducting nanostructures

et al. 2008

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Existing data on photochemical and photocatalytic approaches to the formation of semiconducting nanoparticles and also binary semiconducting nanostructures and nanocomposites of semiconductors with metals and polymers are reviewed. The nature of the effect of irradiation on the synthesis and properties of the obtained nanostructures and the possibility of photocatalytic control of the structural and spectral parameters of nanostructural semiconducting systems are examined.The accumulation of data on the properties of semiconducting (SC) nanomaterials, which has occurred particularly rapidly in the last 7-10 years, has opened up ever more alluring prospects for their application as light-sensitive and light-emitting components in nanophotonics [1-3], nanophotocatalysis [2,[4][5][6][7], biosensorics [8][9][10][11], and other important fields. The possibility of practical utilization is an important factor that has stimulated the search for and study of the processes involved in the formation of nanomaterials. On this account an enormous number of publications have now accumulated on the improvement of existing and development of new methods for the synthesis of semiconducting nanoparticles and nanostructures (e.g., see the reviews [6, 12-15]). A special position among them is occupied by methods based on photochemical transformations conducted either for the purpose of synthesis and directing it along a desired path or for improving the characteristics of nanostructures produced by other methods.Photochemical methods of synthesis have proved more effective than the production of nanomaterials by traditional synthetic approaches, and in a number of cases only they make it possible to achieve the assigned aim. For this reason the synthesis of semiconducting nanostructures and their modification under the conditions of photoirradiation are constantly attracting the attention of investigators, and the number of publications devoted to these questions is constantly increasing. We note, however, that they nevertheless remain disjointed.In view of the foregoing an attempt is made in the present article to organize existing data, to identify the most important directions for research and development, and thus to assess the current state of development of photochemical approaches to the formation of semiconducting nanostructures. Analysis of data on the photochemical formation and post-synthesis photochemical treatment of semiconducting nanostructures and multicomponent nanocomposites, including the nanoparticles of metals and polymers in addition to semiconductors, showed that in spite of the variety and diversity of the proposed approaches all the papers can be ascribed to only three courses: synthesis, synthesis control, and changing the characteristics of the semiconducting nanostructures. For this reason in this review photochemical approaches to the synthesis of nanoparticles of metal chalcogenides, binary semiconducting nanostructures, and nanocomposites consisting of semiconducting and conducting polymers are examin...

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Metallized Polyelectrolyte Microcapsules

Cited by 62 publications

References 49 publications

Freestanding Nanostructures via Layer‐by‐Layer Assembly

Freestanding Nanostructures via Layer‐by‐Layer Assembly

Synthesis and Characterisation of Hollow Spherical Nano- and Microparticles with Silica and Magnetite

Photochemical formation of semiconducting nanostructures

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