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Hollow Particles (hollow + particle)

Distribution by Scientific Domains

Polymers and Materials Science	100%

Distribution within Polymers and Materials Science

Polymer Science & Technology General	60%
General & Introductory Materials Science	40%

Selected Abstracts

Encapsulation and Ostwald Ripening of Au and Au,Cl Complex Nanostructures in Silica Shells,

ADVANCED FUNCTIONAL MATERIALS, Issue 13 2006
W. Lou
Abstract We report a general template strategy for rational fabrication of a new class of nanostructured materials consisting of multicore shell particles. Our approach is demonstrated by encapsulating Au or Pt nanoparticles in silica shells. Other superstructures of these hollow shells, like dimers, trimers, and tetramers can also be formed by nanoparticle-mediated self-assembly. We have also used the as-prepared multicore Au,silica hollow particles to perform the first studies of Ostwald ripening in confined microspace, in which chloride was found to be an efficient mediating ligand. After treatment with aqua regia, Au,Cl complex is formed inside the shell, and is found to be very active under in,situ transmission electron microscopy observations while confined in a microcell. This aspect of the work is expected to motivate further in,situ studies of confined crystal growth. [source]

Synthesis of Monodisperse Colloidal Spheres, Capsules, and Microballoons by Emulsion Templating,

ADVANCED MATERIALS, Issue 7 2005
I. Zoldesi
New types of monodisperse, micrometer-sized, hollow particles (see Figure) are obtained by encapsulation of emulsion droplets in solid shells and dissolution of the cores. A facile fabrication method is used in which, by simply tuning the thickness of the shells, different types of particles with tunable properties are obtained. [source]

Preparation of cationic latices comprising hollow thermostable particles

JOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 9 2004
V. N. Pavlyuchenko
Abstract A method is described for the preparation of cationic latices comprising submicron hollow particles for a possible application as a thermally stable polymeric pigment in coatings or pigmented compositions on the basis of thermosetting polymers cured at temperatures up to 170,190 °C. The method is based on the deposition of melamine,formaldehyde resin in the form of cationic colloid onto anionic hollow particles resulting in the recharging of anionic hollow particles and the formation of an outer melamine shell, which provides thermal stability of the hollow particles at curing and application of pigmented coatings and compositions. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 2225,2234, 2004 [source]

One-Pot Fabrication of Supramolecular Polymer Particles via Situ Polymerization Stringed Assembly of a Two-Monomer Microemulsion

MACROMOLECULAR RAPID COMMUNICATIONS, Issue 4 2006
Yongxin Wang
Abstract Summary: A novel method, situ polymerization stringed assembly (SPSA), is proposed to prepare stable solid or hollow supramolecular polymer particles, which are assembled by numerous nanoparticles. By this method, the fabrication of primary nanoparticles (poly(methyl methacrylate), PMMA), the linkers (polyvinylpyrrolidone, PVP, chains) between the nanoparticles, and the final assembled solid or hollow particles could be achieved in just one-pot by methyl methacrylate (MMA)/N -vinylpyrrolidone (NVP) microemulsion polymerization under UV irradiation. The structures of the supramolecular particles can be changed from solid to hollow by tuning the mass ratio of MMA/NVP in the microemulsion. AFM, TEM, and SEM experiments are performed to identify the results. AFM image of the PMMA/PVP solid particles obtained from the photopolymerization of the microemulsion containing 20 wt.-% MMA, 10 wt.-% NVP, and 5,×,10,2 wt.-% BP. [source]