Hollow CuO nanospheres have been prepared via a reduction reaction of copper ions on porous Si nanowires combined with calcination in air and uniformly anchored on their surfaces. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were employed to characterize and analyze as-synthesized samples. The results reveal that Si nanowi...

This paper presents the experimental realization of magnetic hollow microspheres. Starting from core-shell microspheres with an organic core and a shell composed of nanoparticles, we could remove the core using a plasma etching technique. An estimate of the magnetoelastic effects arising from the interplay of magnetic dipolar interactions and cohesive energy which can be expected in such struct...

Adv. Mater. 2010, 22, 415–418 2010 WILEY-VCH Verlag Gm Porous nanostructured metals have been investigated for their various applications, such as catalysts, gas and thermal sensors, and electronics. Approaches for preparing such porous materials include coating templates and removing these templates by etching or thermal annealing. Recently, the deposition of metals on porous biomineral templa...

Macroporous SnO2 (mp-SnO2(P-n); P means polymethylmethacrylate (PMMA) and n = diameter of PMMA microsphere) thick film gas sensors were fabricated by a modified sol-gel method by employing PMMA microspheres (n = 800, 400, 250 and 150 nm) as a template and SnCl2 as a tin source. Morphology of mp-SnO2 films was markedly dependent on the SnCl2 concentration and the diameter of PMMA microspheres. E...

Glucan particles (GPs) are hollow, porous 2-4 μm microspheres derived from the cell walls of Baker's yeast (Saccharomyces cerevisiae). The 1,3-β-glucan outer shell provides for receptor-mediated uptake by phagocytic cells expressing β-glucan receptors. GPs have been used for macrophage-targeted delivery of soluble payloads (DNA, siRNA, protein, and small molecules) encapsulated inside the hollo...

Thanks to their high energy density, light weight and long cycle life, rechargeable lithium ion batteries (LIBs) have become one of the dominant power sources for portable electronic devices. With the growing need for higher capacity and safety, numerous efforts have been made to develop alternative high-performance electrode materials for next-generation LIBs. As an example, the anode electrod...

Hybrid hollow microspheres are fabricated successfully from double emulsions stabilized by single-component amphiphilic silica nanoparticles, which were formed and partially modified in situ at the interface of water-in-oil emulsions.

the value of the permeability in fluid flow through porous media is important for process investigation. in low reynolds number, the classic darcy’s law is suitable for simulation of fluid flow. in this paper, an experimental study for evaluation of preformed fiber permeability has been done. also, the deviations from the classical darcy law by experimental and numerical simulation of the navie...

Foam composite panels made from hybrid fillers are materials developed to have low density with high mechanical properties. This work focuses on improving the properties of epoxy-based foam hybridized by combining hollow glass microspheres (HGM) and nanoclay. The HGM content was varied 1 wt.% 3 in composites panel, while nanoclay 5 each HGM-filled series these were fabricated using a convention...