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Spherical Assemblies (spherical + assembly)

Distribution by Scientific Domains
Polymers and Materials Science75%

Selected Abstracts

Sonochemical Synthesis of CdSe Hollow Spherical Assemblies Via an In-Situ Template Route

ADVANCED MATERIALS, Issue 2 2003
J.J. Zhu
CdSe hollow spherical assemblies composed of 5 nm nanoparticles have been synthesized sonochemically. During the process, amorphous Cd(OH)2, which acts as the in-situ template, directs the growth of primary CdSe nanoparticles on its surface and their assembly into hollow spherical structures. The Figure is a schematic of the proposed mechanism for the formation of the hollow chalcogenide spheres. [source]

Noble Metal Nanocrystal-Incorporated Fullerene-Like Polyoxometalate Based Microspheres

ADVANCED FUNCTIONAL MATERIALS, Issue 6 2009
Amjad Nisar
Abstract Monodisperse fullerene-like polyoxometalate-based microspheres are synthesized using a single-phase approach which is quick, easier to control surfactant to polyoxometalate (POM) molar ratios and result in better control over the size-distribution range. Noble-metal nanocrystals are successfully incorporated in the surfactant encapsulated complex multilayered spherical assemblies without any change in their layered morphology. Combining the merits of fullerene-like POMs and monodisperse noble metal nanocrystals, these monodisperse hybrid spheres show interesting composition- and size-dependent photochemical properties. [source]

Sonochemical Synthesis of CdSe Hollow Spherical Assemblies Via an In-Situ Template Route

ADVANCED MATERIALS, Issue 2 2003
J.J. Zhu
CdSe hollow spherical assemblies composed of 5 nm nanoparticles have been synthesized sonochemically. During the process, amorphous Cd(OH)2, which acts as the in-situ template, directs the growth of primary CdSe nanoparticles on its surface and their assembly into hollow spherical structures. The Figure is a schematic of the proposed mechanism for the formation of the hollow chalcogenide spheres. [source]

An icosahedral assembly of the light-harvesting chlorophyll a/b protein complex from pea chloroplast thylakoid membranes

ACTA CRYSTALLOGRAPHICA SECTION D, Issue 5 2004
Tomoya Hino
When the light-harvesting chlorophyll a/b protein complex (LHC-II) from pea thylakoid membranes is co-crystallized with native lipids, an octahedral crystal that exhibits no birefringence is obtained. Cryogenic electron micrographs of a crystal edge showed the crystal to be made up of hollow spherical assemblies with a diameter of 250,Å. X-ray diffraction data at 9.5,Å resolution revealed the spherical shell of LHC-II to have icosahedral symmetry. A T = 1 icosahedral model of LHC-II, in which the stromal surface of the protein faces outward, was constructed using the previously reported structure of the LHC-II trimer [Kühlbrandt et al. (1994), Nature (London), 367, 614,621]. The present result shows the first example of a well ordered three-dimensional crystal of icosahedral proteoliposomes. [source]