Described are the preparation and functional characterization of nanocrystalline and/or amorphous thin films comprising of neutral “molecular squares” of the form [Re(CO)3(Cl)(μ-L)]4 (L ) difunctional imine or azine ligand). The films are strongly adherent, stable in aqueous media, and characterized by comparatively few pinhole defects. Electrochemical transport experiments show that the materi...

The growing interest in wood accessories has focused scientific research attention on cutting with small diameter tools. A problem that may arise when drilling is the phenomenon of wandering – hole not made designed place. difficulty studying drill holes (0.5 mm to 0.9 mm) due automatic measurement. development an appropriate methodology allow for observation this without need high-class hardwa...

Nanoporous anodic aluminum oxide (AAO) has been used in many different fields of science and technology, due to its great structural characteristics. Solar selective surface is an important application of this type porous material. This paper investigates the effect of nanoporous AAO properties, including; film thickness, pore area percentage and pore diameter, on absorption spectra in the rang...

In this paper, the pore structure characterization of concrete exposed to deionised water and 5% NaCl solution was evaluated using mercury intrusion porosity (MIP), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The effects of calcium leaching, fly ash incorporation, and chloride ions on the evolution of pore structure characteristics were investigated. The results demonstrate ...

Both plants and animals possess analogous tissues containing hierarchical networks of pores, with pore size ratios that have evolved to maximize mass transport and rates of reactions. The underlying physical principles of this optimized hierarchical design are embodied in Murray's law. However, we are yet to realize the benefit of mimicking nature's Murray networks in synthetic materials due to...

Porosity is a typical defect in additively manufactured (AM) parts. Such defects limit the properties and performance of AM parts, and need to be characterized accurately. Current methods for characterization using microstructure rely on classical stereological methods that extrapolate information from two dimensional images. Newer three dimensional (3D) microstructural analysis techniques prov...

ABSTRACT i i ABSTRACTi i ABSTRACT In the present work, the elaboration, characterisation and applications of different porous materials have been studied. Porous materials are divided into three categories depending on the porous cavity size, namely microporous materials (pore diameter < 2 nm), mesoporous materials (2 nm < pore diameter < 50 nm) and macroporous materials (pore diameter > 50 nm)...

A porous hydroxyapatite/collagen composite (HAp/Col) was developed that consists of hydroxyapatite nanocrystals and atelocollagen. In this study, cylindrical (diameter: 5 mm, height: 3 mm) porous HAp/Col implants with different pore sizes (diameter: 160 or 290 microm) were prepared, and the influences of pore size and implanted volume were evaluated using a rabbit bone defect model. In the impl...