Materials Literature
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We have examined the relaxation that occurs in the supercooled plastic crystalline phases of pentachloronitrobenzene (PCNB), dichlorotetramethylbenzene (DCTMB), trichlorotrimethylbenzene (TCTMB) along with some of their deuterated samples, and 1-cyanoadamantane (CNADM) in the presence of intentionally added dopants. T…
We present three different preparation methods for CdSe colloidal nanoparticles that, when carried out into the Ostwald ripening regime, lead to the development of complex spectral patterns resulting from the overlap of several distinct components corresponding to different kinds of nanoparticles coexisting in solutio…
Abstract This study reports the X‐and Ku‐band microwave transmittance, reflectance, conductivity, and shielding effectiveness of nano structured electropolymerised polyaniline (PANI) thin films on stainless steel. Waveguide reflectometer method has been used for the microwave studies. Microwave conductivity varies bet…
Abstract Archaeological silver objects are often found to be embrittled to some extent. Using light and scanning electron microscopy techniques, X‐ray diffraction and AES, the causes of this embrittlement were studied on a silver artefact buried for more than 1000 years in soil. This investigation revealed the presenc…
The azobenzene moiety, well-known not only for its reversible cis-to-trans photoisomerization but also as a hapten, does not induce antibodies on its own, but it reacts with antibodies raised against conjugates with protein carriers. Hence we selected azobenzene dye as an indicator to assess the possibility of having…
Abstract Ten types of rare earth (RE) compounds modified carbon black (HAF‐RE) were prepared using chemical‐deposit method, then HAF‐RE were mixed with natural rubber latex to prepare HAF‐RE filled powdered natural rubber [P(NR/HAF‐RE)] by a carbon black/rubber latex coagulation method. It is found that most of the P(…
Novel one-dimensional (1D) nanostructures of rare earth complexes (europium methacrylate (Eu(MA)(3))) have been prepared from the precursor of irregularly shaped Eu(MA)(3) powder in ethanol solvent without the assistance of an added surfactant, catalyst, or template. These hexagonal-shaped complex nanowires have diame…
In lysine biosynthesis, dihydrodipicolinate reductase (DHDPR) catalyses the formation of tetrahydrodipicolinate. Unlike DHDPR enzymes from Escherichia coli and Mycobacterium tuberculosis, which have dual specificity for both NADH and NADPH as co-factors, the enzyme from Thermotoga maritima has a significantly greater…
High Resolution Image Download MS PowerPoint Slide A novel method of determining nanocluster sizes and size distributions using high-angle annular dark-field imaging in scanning transmission electron microscopy is described. This method is demonstrated for MgO-supported [Os 10 C(CO) 24 ] 2- clusters formed by treating…
Alpha-helices are the most common secondary structures found in globular proteins. In this report, we analyze the stereochemical and sequence properties of helix-X-helix (HXH) motifs in which two alpha-helices are linked by a single residue, in search of characteristic structures and sequence signals. The analysis is…
Magnetron sputtered SnO2 thin films on fused silica substrates were doped with 3, 5, and 7at.% Co by the ion-implantation technique leading to ferromagnetic order at room temperature. Transmission electron microscopy combined with energy loss spectroscopy confirms the absence of Co clusters which are larger than the r…
Cores for thought: Dendrimers based on an octahedral symmetry and with a central positively charged transition-metal complex have been prepared up to the third generation (see schematic representation). The shape-persistent dendrimers with a high density of aromatic rings are accessible by either a partly convergent s…
Prolonged exposure to gadolinium-based contrast (GBC) appears to be the core pathophysiologic factor in the development of nephrogenic systemic fibrosis (NSF). As the GBC is renally excreted, this condition is predominantly seen only following exposure in patients with severe reductions in renal function. Fortunately,…
Hexagonal boron nitride nanotubes (BNNTs) were synthesized at a low substrate temperature of 800 °C on nickel (Ni) coated oxidized Si(111) wafers in a microwave plasma-enhanced chemical vapor deposition system (MPCVD) by decomposition and reaction of gas mixtures consisting of B(2)H(6)-NH(3)-H(2). The 1D BN nanostruct…
Gadolinium-based contrast (GBC) exposure has recently been linked to the development of nephrogenic systemic fibrosis (NSF) in patients with underlying kidney disease and may in fact be the previously unrecognized trigger for the fibrosing process. As NSF is fairly rare in this patient population, a number of permissi…
Abstract This study is part of a project aiming at a better understanding of polypeptide and protein interactions with a metal surface. A tripeptide (the glutathione, or GSH) was deposited, under ultra high vacuum, on Au (111). From reflection–absorption infrared spectra (RAIRS), GSH was adsorbed in its zwiterrionic f…
Abstract Silicon nanocrystals (Si‐ncs) embedded in a dielectric matrix (e.g. Si 3 N 4 , SiO 2 ) attract significant interest for their use in silicon‐based devices such as memories, light amplifiers, and light emitting diodes. Si‐ncs in an SiO 2 matrix are generally obtained through thermal annealing of silicon‐rich o…
We reported the all electronic demonstration of spin injection and detection in the trilayers with hybrid structure of CoFeB∕GaAs∕(Ga,Mn)As (metal/insulator semiconductor) by probing the magnetoresistance at low temperature from 1.8to30K. Tunneling magnetoresistance (TMR) ratios of 3.8%, 4.7%, 2.9%, and 1.4% at 1.8, 1…
Abstract In creating thin films of polymers by solution processing, a common problem is the undesirable formation of bubbles during the drying process. Practical experience shows that bubbles can be created well below the boiling point of the solvent. Also, it has been observed that the degassing of the polymer soluti…
In this work several complementary techniques have been employed to carefully characterize the sintering and crystallization behavior of CaO–Al 2 O 3 –ZrO 2 –SiO 2 glass powder compacts after different heat treatments. The research started from a new base glass 33.69 CaO–1.00 Al 2 O 3 –7.68 ZrO 2 –55.43SiO 2 (mol%) to…