Materials Literature
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This paper describes the synthesis of silver nanoparticles in a continuous flow tubular microreactor using silver pentafluoropropionate as a single-phase reactant precursor. This precursor can be thermally reduced in isoamyl ether to form silver nanoparticles in the presence of trioctylamine. The reaction is suitable…
Human mesenchymal stem cells (hMSC) derived from bone marrow aspirates can form the basis for the in vitro cultivation of autologous tissue grafts and help alleviate the problems of immunorejection and disease transmission associated with the use of allografts. We explored the utility of hMSC cultured on protein scaff…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic TTF-Based Charge-Transfer ComplexesToshiaki Enoki and Akira MiyazakiView Author Information Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan Cite this: Chem. Rev. 2004, 104, 11, 5449–5478Publication Date (Web)…
Bone marrow mesenchymal stem cells (MSCs) can differentiate into a variety of cell types, including vascular smooth muscle cells (SMCs), and have tremendous potential as a cell source for cardiovascular regeneration. We postulate that specific vascular environmental factors will promote MSC differentiation into SMCs.…
Nearly monodisperse ZnSe and ZnS nanocrystals were formed in noncoordinating solvents using alternative precursors. The parameter window for the growth of high quality zinc chalcogenide nanocrystals was found to be much narrower than that of the corresponding cadmium chalcogenide nanocrystals. In contrast to syntheses…
Materials science has traditionally involved the study of the self-assembly of atoms or molecules into bulk thermodynamic phases. In her Perspective, Glotzer predicts that this field will be revolutionized by new materials made from larger, more complex building blocks designed to assemble in specific ways. These buil…
The first discrete, selenium-centered tetranuclear zinc cluster [Zn4(mu4-Se)[Se2P(OPr)2]6] was isolated and characterized. The cluster consists of six edge-bridged dsep ligands with four zinc atoms in a slightly distorted tetrahedron and a mu4-Se atom in the center. In addition, 12 mu2-bridging selenium atoms form a S…
In this work, the thermal conductivity of nanofilms, nanowires, and nanoparticles are studied using molecular dynamics simulation. It is found that their thermal conductivity depends significantly on the characteristic size until it reaches a large value. Comparison with results of the lattice Boltzmann method reflect…
Abstract Based on 1,4‐succinic acid, 1,4‐butanediol, poly(ethylene glycol)s and dimethyl terephthalate, biodegradable segmented multiblock copolymers of poly[(butylene terephthalate)‐ co ‐poly(butylene succinate)‐ block ‐poly(ethylene glycol)] (PTSG) were synthesized with different poly(butylene succinate) (PBS) molar…
Abstract The synthesis of a novel nonlinear optical (NLO) chromophore with threefold symmetry − 2,5,8‐tris(diethylamino)‐1,3,4,6,7,9,9b‐heptaazaphenalene ( 4 ) − is reported. Compound 4 was synthesized from 2,5,8‐trichloro‐1,3,4,6,7,9,9b‐heptaazaphenalene ( 3 ) through a nucleophilic aromatic substitution, its structu…
Polymeric substrates of different surface chemistry and length scales were found to have profound influence on cell adhesion. The adhesion of fibroblasts on surfaces of oxidized polystyrene (PS), on surfaces modified with random copolymers of PS and poly(methyl methacrylate) [P(S-r-MMA)] with topographic features, and…
Golden prospects: Monolayers of the fourth-generation dendrimer G4-SH, which is decorated with 96 terminal thiol groups (see picture), bind Au55(PPh3)12Cl6 clusters as monolayers under inert conditions. In an atmosphere of CH2Cl2 the clusters begin to move and lose their ligand shell, which leads to the formation of n…
Abstract The thermodynamic miscibility and thermal and dynamic mechanical behaviour of semi‐interpenetrating polymer networks (semi‐IPNs) of crosslinked polyurethane (PU) and linear poly(hydroxyethyl methacrylate) (PHEMA) have been investigated. The free energies of mixing of the semi‐IPN components have been determin…
We investigate two-dimensional melting of a colloidal system in the presence of a one-dimensional periodic substrate potential created by two interfering laser beams. We study the commensurability ratio p=sqrt[3]a/2d=2 with a the mean particle distance and d the period of the periodic potential. In contrast with the p…
Abstract The critical role of the ionic conductivity properties of materials in the development of Intermediate Temperature Solid Oxide Fuel Cell (IT‐SOFC) technology has been emphasized over the past decade. However, from a fundamental point of view, little is known of the physicochemical parameters influencing ionic…
Einen gewellten, schichtartigen [Si2O2N2]2−-Anionenverband, der aus Dreierringen aufgebaut ist, enthält das Schichtsilicat Ca[Si2O2N2] (siehe Bild). Die ungewöhnliche Struktur ergibt sich aus der Tatsache, dass die N-Atome, anders als die O-Atome in Oxosilicaten, jeweils drei benachbarte Si-Tetraederzentren in den Sch…
The corrosion inhibition of carbon steel in 3% de-aerated NaCl acidic solution with amine–fatty acid corrosion inhibitor, KI384, was investigated at different temperatures using potentiodynamic polarization technique. The Corrosion rate was calculated in the presence and absence of inhibitor. The inhibition increased…
The effects of multiple-beam interference within a series of wave plates whose principal axes are rotated with respect to each other are explored. This is done by expanding the formulation of the matrix algebra which was originally developed for multilayer thin-film optics. As an important example, the new method has…
The adsorption of acetaldehyde and its coadsorption and reaction with NO 2 were investigated on a Na−Y,FAU zeolite using in situ FTIR spectroscopy. Acetaldehyde adsorbs strongly over Na−Y and desorbs molecularly at around 400 K with very limited extent of condensation or polymerization. Reaction between CH 3 CHO and N…
The magnetic properties of the layered compound ${({\mathrm{C}}_{2}{\mathrm{N}}_{2}{\mathrm{H}}_{10})}_{1∕2}\mathrm{Fe}\mathrm{P}{\mathrm{O}}_{4}(\mathrm{O}\mathrm{H})$ have been studied using dc magnetization and ac susceptibility measurements. The compound orders as a canted antiferromagnet at ${T}_{c}=29.6\phantom{…