Materials Literature
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The fast and inexpensive production of single-crystal silicon nanowires, which circumvents the use of lithography, is achieved by pyrolysis of silane in nanochannel alumina with a gold catalyst. The nanowires (see Figure for an SEM image) are very straight, not intertwined, and uniform in diameter and length. They sho…
Direct-current plasma-enhanced chemical vapor deposition (CVD) with mixtures of acetylene and ammonia was optimized to synthesize aligned carbon nanotubes (CNTs) on Co- or Ni-covered W wires with regard to wire temperature, wire diameter, gas pressure, and sample bias. A phase diagram of CNT growth was established exp…
Relaxations in a poly(alkyl methacrylate) series are systematically influenced by chemical modifications like the variation of side-chain length, random copolymerization, or molecular weight. Recent results concerning the influence of chemical modifications on special parts of the relaxation chart are reviewed. The di…
▪ Abstract This review summarizes recent advances and future research trends in the field of phospholipid-based biomaterials. Lipids play an important role in biomineralization and countless other biological processes, and they are receiving increasing attention for the synthesis of new biomimetic biomaterials. Severa…
This paper examines the development of starch-based plastics for use as biodegradable mulch film. A variety of starch-based polymers are blended with high performance biodegradable polyester polymers in order to determine the applicability of films to be processed on a film blowing line and to perform well in mulch fi…
[reaction: see text]. Benzyl aryl ether dendrons and dendrimers containing thermally reversible furan-maleimide Diels-Alder adducts were prepared up to the third generation. The covalent cleavage and reassembly of the dendrons and dendrimers were evaluated by 1H NMR.
The correction of soft-tissue defects presents a challenge in plastic and reconstructive surgery. The implantation of isolated and culture-expanded adipose precursor cells is a solution to this problem because these cells differentiate into adipocytes when implanted in vivo. Appropriate scaffolds are needed in soft-ti…
A red-light emitting europium complex(see Figure) is investigated here as an alternative to traditional fluorescent materials, which have an inherent electroluminescence (EL) efficiency limited to 25 % of their photoluminescence (PL) efficiency. It is shown that by optimizing the structure of Eu complex–based devices…
A simple and elegant approach to fabrication of dense ceramic membranes on porous substrates, a traditional dry pressing of foam powders, has been developed to reduce the cost of fabrication. Gd‐doped ceria (GDC, Gd 0.1 Ce 0.9 O 1.95 ) electrolyte membranes as thin as 8 μm are obtained by dry‐pressing highly porous GD…
Novel nonlinear optical (NLO) building blocks can be placed into the periphery, branch, or core of a dendrimer to construct precise molecular architecture with predetermined chemical composition. The site-isolation effect, through the encapsulation of active moieties by dendrons, or the cooperative effect, through the…
▪ Abstract Recently there have been significant advances in understanding the magnetic properties of epitaxial ferrite films that are not found in bulk ferrites. Much effort has been expended on trying to achieve bulk properties in thin films for a wide range of applications. From a fundamental science perspective, ep…
Commercial and semi-commercial biobased materials (Polylactate, PLA, polyhydroxy-butyrate, PHB, wheat starch and corn starch) were investigated. Physical and mechanical characterisation (tensile strength, elongation, tear strength, compression, gas permeability (CO2 and O2) and water vapour permeability (WVP)) was exa…
A new synthetic approach leading to asymmetrically substituted polyphenylene dendrimers is presented. Following this method, polyphenylene dendrimers decorated with an increasing number of chromophores at the periphery have been obtained up to the second generation. Especially the synthesis of a polyphenylene dendrime…
In previous works, we had shown that blending plasticised wheat starch (PWS) with biodegradable polyesters improves properties such as the water resistance. The present study was more specifically based on PWS/cellulose fibres composites. In addition, these multiphase systems (blends and composites) have been tested w…
The surface of gold nanorods is coated with thickness-controlled silver by reducing AgCl 4 3- exclusively on the metallic surface to form Au core Ag shell nanorods and then restored by selectively removing the silver coating. Au core Ag shell nanorods show much sharper, stronger, and shorter-wavelengthed surface plasm…
To elucidate the relation between structural and magnetic properties, we have synthesized molecular materials having both Cotton effects and a ferromagnetic long range order. Such optically active 3D molecule-based magnets were rationally designed using the enantioselective template effect of optically active cations,…
The behavior of PAMAM-dendrimer encapsulated palladium nanoparticles as catalysts for the Heck reaction has been examined, and it has been demonstrated that this simple system is a very efficient catalyst giving good yields under phosphine-free conditions and with 200−400 times less Pd than usual.
Two desorption peaks of hydrogen molecule (mass number=2), starting at about 600 and 950 K, respectively, are observed in thermal desorption mass spectroscopy of nanostructured graphite mechanically milled for 80 h under hydrogen atmosphere. It follows from a combined analysis of thermal desorption mass spectroscopy a…
Rheology plays an important role in dewatering processes. It is therefore interesting to analyze the dewatering process and the rheological behavior of a suspension simultaneously. An exact determination of the immobilization point at the maximum of the loss factor as well as the immobilization time can be attained us…