Materials Literature
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Colloidal quantum dots (QDs) offer advantageous properties as an optical gain media for lasers. Optical gain in the QDs has been shown in the whole visible spectrum, yet it has been intrinsically challenging to realize efficient amplified spontaneous emission (ASE) and lasing in the blue region of the visible spectrum…
Abstract The acid properties of a series of alumina‐supported tungsten oxide (WO 3 /Al 2 O 3 ) catalysts with loadings of 5–50 wt % WO 3 calcined at various temperatures were investigated by acid‐catalyzed reactions (benzylation of anisole and isomerization of α‐pinene) and FTIR spectroscopy. The relationships between…
A novel single-source precursor NaGd(TFA)4 (diglyme) (TFA=trifluoroacetate) was synthesized, characterized thoroughly, and used to obtain the hexagonal phase of NaGdF4 nanoparticles as an efficient matrix for lanthanide-doped upconverting nanocrystals (NCs) that convert near-infrared radiation into shorter-wavelength…
The instability of geometrically imperfect shape memory alloy (SMA) fibers reinforced with hybrid laminated composite (SMAHC) plates and subjected to a uniform thermal loading is analytically investigated. The material properties of the SMAHC plates are assumed to be functions of temperature. Nonlinear equations of th…
Catalytic activity is of pivotal relevance in enabling efficient and selective synthesis processes. Recently, covalent coupling reactions catalyzed by solid metal surfaces opened the rapidly evolving field of on-surface chemical synthesis. Tailored molecular precursors in conjunction with the catalytic activity of the…
Highly crystalline Bi2Te3 nanotubes are fabricated on a large scale by a facile one-pot hydrothermal method. In our synthesis, single crystal Te nanorods form first as not only the intermediate but also the sacrificed template, which enables the epitaxial growth of the Bi2Te3 crystal on the Te template along the c-axi…
Sonic properties of spider silks are measured independent of the web using laser vibrometry and ballistic impact providing insights into Nature's design of functionalized high-performance materials. Through comparison to cocoon silk and other industrial fibers, we find that major ampullate silk has the largest wavespe…
In this work a chemical vapour deposition (CVD) process was implemented and automatized for the synthesis of carbon nanotubes (CNTs). Looking the possibility to make an extensive use of biogas, and also for decreasing the costs of the process, methane was used as carbon source. Different CNT structures were obtained u…
Cerium-doped nanoparticles capped with different levels of poly ethylene glycol (PEG) have been synthesized in aqueous solution by a simple chemical precipitation method. The synthesized particles were characterized by X-ray diffraction (XRD), UV–vis absorption and room temperature photoluminescence (PL) spectroscopy.…
The electrogenerated chemiluminescence (ECL) of monodispersed Au 144 (SC 2 H 4 Ph) 60 is reported for the first time. Near-infrared ECL of the clusters with a peak wavelength of 930 nm was observed with tri- n -propylamine as the coreactant. On the basis of the energetics and spooling photoluminescence spectroscopy of…
Azobenzene-3,3'-dicarboxylic acid exists in photoisomerizable (E) and (Z)-forms. Deprotonation of the carboxylic acid groups from the (E)-form occurs simultaneously, whereas in the (Z)-form it occurs in a stepwise fashion. The mono anionic form of the (Z)-isomer acts as a glycosidase mimic that proceeds through a gene…
Herein, we present the formulation and the characterization of novel adiponitrile-based electrolytes as a function of the salt structure, concentration, and temperature for supercapacitor applications using activated carbon based electrode material. To drive this study two salts were selected, namely, the tetraethylam…
The structural properties of poly(lactic-acid) PLA nanofiber scaffolds prepared by electrospinning have been correlated with their process condition. The influence of the electrospinning processing parameters on structure including fiber orientation, take-up velocity and post-thermal treatment was analyzed. The struct…
We develop a first-principles theoretical approach to doping in field-effect devices. The method allows for calculation of the electronic structure as well as complete structural relaxation in field-effect configuration using density-functional theory. We apply our approach to ionic-liquid-based field-effect doping of…
It has long been under debate whether the electron transport performance of graphene could be enhanced by the possible occurrence of van Hove singularities in grain boundaries. Here, we provide direct experimental evidence to confirm the existence of van Hove singularity states close to the Fermi energy in certain ord…
The Kondo effect, a widely studied phenomenon in which the scattering of conduction electrons by magnetic impurities increases as the temperature T is lowered, depends strongly on the density of states at the Fermi energy. It has been predicted by theory that magnetic impurities on free-standing monolayer graphene exh…
The generalized stacking fault energy (γ surface) provides fundamental physics for understanding the plastic deformation mechanisms. Using the ab initio exact muffin-tin orbitals method in combination with the coherent potential approximation, we calculate the γ surface for the disordered Cu-Al, Cu-Zn, Cu-Ga, Cu-Ni, P…
A photochemical modification of melt-extruded polymeric nanofibers is described. A bioorthogonal functional group is used to decorate fibers made exclusively from commodity polymers, covalently attach fluorophores and peptides, and direct cell growth. Our process begins by using a layered coextrusion method, where pol…
Realization and emphasis of change as the most fundamental property of biomarker and homeostatic nature of blood starts the urine biomarker era. But the different homeostatic natures of urine and blood determined that the road to the biomarkers is drastically different. Despite the advantage of urine as a better bioma…
Strongly correlated oxides that undergo a metal‐insulator transition (MIT) are a subject of great current interest for their potential application to future electronics as switches and sensors. Recent advances in thin film technology have opened up new avenues to tailor MIT for novel devices beyond conventional CMOS s…