Materials Literature
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Abstract A new porous organic polymer (POP) with high thermal stability and large surface area has been synthesized and applied in the preparation of Pd/POP catalyst. Pd/POP was characterized by XRD, TGA, SEM and TEM. The catalyst consists of highly dispersed palladium nanoparticles of 0.9–4 nm size on POP with a larg…
Bacterial polysaccharides and polyhydroxyalkanoates present physical and chemical characteristics that impart them diverse functional properties, including the ability to produce structures from nano- to macroscale (e.g., spheres, capsules, beads). Such structures may be specially designed to fulfill the requirements…
A series of zinc azaphthalocyanines with two azacrowns in a rigid tweezer arrangement were prepared and the fluorescence sensing properties were investigated. The size-driven recognition of alkali and alkaline earth metal cations was significantly enhanced by the close cooperation of the two azacrown units, in which b…
In this work, the impact of structure and composition on the dealloying of bulk and nanoscale alloys Cu x Au (1– x ) have been discussed. In comparison with the dealloying of Ag—Au alloys, the Cu—Au system exhibits dealloying curves with more features associated generally with multistage dealloying. It has been shown…
Gelatin’s excellent foaming ability allows the application of in situ gas foaming as a preparation technique for porous scaffold development. Here, a new iterative experimental design for in situ gas foaming method is reported. The prepared scaffolds were studied for applying the findings to the future skin tissue eng…
Abstract Thermal conductivities of silicone matrix polymers including fillers of diamond particles and/or hexagonal boron nitride (h-BN) platelets were systematically investigated in an attempt to find a thermal interface material (TIM) having high isotropic thermal conductivity and high electrical insulating ability…
Liquid-crystalline blue phases (BPs) are stable only for very narrow temperature range between the isotropic and the chiral nematic phase that severely hinders their applicability. Herein, the aminoazobenzol group was chemically grafted onto epoxy group of graphene oxide (GO) via addition reaction. Successful grafting…
The spin dynamics of Cr8 Mn, a nine-membered antiferromagnetic (AF) molecular nanomagnet, are investigated. Cr8 Mn is a rare example of a large odd-membered AF ring, and has an odd-number of 3d-electrons present. Odd-membered AF rings are unusual and of interest due to the presence of competing exchange interactions t…
Abstract The co‐adsorption of O 2 and CO on anionic sites of gold species is considered as a crucial step in the catalytic CO oxidation on gold catalysts. In this regard, the [Au 2 O 2 (CO) n ] − ( n =2–6) complexes were prepared by using a laser vaporization supersonic ion source and were studied by using infrared ph…
The oxidation behavior of chromium and the corrosion behavior of austenitic stainless steel in boiling nitric acid solution containing highly concentrated nitrates were investigated using UV-visible spectroscopic measurements, Raman spectral measurements, immersion tests, and potentiodynamic polarization measurements.…
ABSTRACT Rotaxane‐type hyperbranched polymers are synthesized for the first time from A 2 B type semi‐rotaxane monomers formed in situ via complexation of bis( m ‐phenylene)‐32‐crown‐10 dimethanol ( 1 ) and two paraquat ω ‐ n‐ alkylenecarboxylic acid derivatives with tris( p‐t‐ butylphenyl)methylphenylalkylene stopper…
Colloidal quantum dots (CQDs) are highly versatile nanoscale optoelectronic building blocks, but despite their materials engineering flexibility, there is a considerable lack of fundamental understanding of their electronic structure as they couple within thin films. By employing a joint experimental-theoretical study…
Abstract The first examples of air‐stable 20π‐electron 5,10,15,20‐tetraaryl‐5,15‐diaza‐5,15‐dihydroporphyrins, their 18π‐electron dications, and the 19π‐electron radical cation were prepared through metal‐templated annulation of nickel(II) bis(5‐arylamino‐3‐chloro‐8‐mesityldipyrrin) complexes followed by oxidation. Th…
Diatoms are important phototrophs in the worlds’ oceans contributing approximately 40% of the global primary photosynthetic production. This is partially explained by their capacity to exploit environments with variable light conditions, but there is limited knowledge on how diatoms cope with changes in the spectral c…
The ionic purity of nanoparticles can affect electrical properties of liquid crystals in very unusual ways. While 100% pure nanoparticles can only decrease the concentration of mobile ions in liquid crystals by means of adsorption/desorption processes, nano-dopants contaminated with ions can lead to the increase, decr…
Collagen VI, a collagen with uncharacteristically large N- and C-terminal non-collagenous regions, forms a distinct microfibrillar network in most connective tissues. It was long considered to consist of three genetically distinct α chains (α1, α2, and α3). Intracellularly, heterotrimeric molecules associate to form d…
BACKGROUND: Several in vitro studies document the function of the transcriptional regulator TrmBL1 of Pyrococcus furiosus. These data indicate that the protein can act as repressor or activator and is mainly involved in transcriptional control of sugar uptake and in the switch between glycolysis and gluconeogenesis. T…
Function at all scales: Hierarchical assemblies of nanoparticles provide routes to multifunctional materials, in which structures at different scales impart different functions. Plasmonic vesicles formed by nanoparticle "strings" are useful both as contrast agents for photoacoustic imaging and as light-activated drug-…
We examine the ricochet and penetration behavior in sand, water and gelatin by steel spheres, 7.62 mm APM2 and 25 mm projectiles. A threshold impact angle (critical angle) exists beyond which ricochet cannot occur. The Autodyn simulation code with the smooth particle hydrodynamic (SPH) method and Impetus Afea Solver w…
We report the synthesis of ZnO nanowires by a catalyst‐free vapor‐transport process on SiO 2 /Si substrates. A modification of the method was performed using small ZnO nanoparticles (∼5 nm) in low concentration suspensions. The use of dichloromethane or toluene in the suspensions influences the nanoparticle distributi…