Materials Literature
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We study the hydrogen storage properties of planar boron sheets and compare them to those of graphene. The binding of molecular hydrogen to the boron sheet (0.05 eV) is stronger than that to graphene. We find that dispersion of alkali metal (AM = Li, Na, and K) atoms onto the boron sheet markedly increases hydrogen bi…
The low-energy dynamical optical response of dimerized and undimerized spin liquid states in a one-dimensional charge transfer Mott insulator is theoretically studied. An exact analysis is given for the low-energy asymptotic behavior using conformal field theory for the undimerized state. In the dimerized state, the i…
We develop a simple chemical method to obtain bulk quantities of N-doped, reduced graphene oxide (GO) sheets through thermal annealing of GO in ammonia. X-ray photoelectron spectroscopy (XPS) study of GO sheets annealed at various reaction temperatures reveals that N-doping occurs at a temperature as low as 300C, whil…
Theoretical work predicts that the strong dependence of Tc on pure shear strain within the a-b plane of optimally doped YBa2Cu3O{7-delta} results in heterogenous columnar pins of vortex lines about dislocation lines and about nano-columns inclusions aligned in parallel to the c axis. The critical current of a rigid vo…
Three in one: Heterotrimetallic 1D coordination polymers are designed by assembling heteronuclear nodes (see figure), {Cu2Ln}, with paramagnetic octacyanido-metallates, [M(CN)8]3− (M=Mo, W), acting as spacers. By choosing a strongly anisotropic lanthanide (DyIII), a new single chain magnet is obtained.
Recent developments in the biosynthesis of nanomaterials have demonstrated the important role of biological systems and microorganisms in nanoscience and nanotechnology. These organisms show a unique potential in environmentally friendly production and accumulation of nanoparticles with different shapes and sizes. The…
Patient relapse and metastasis of malignant cells is very common after standard cancer treatment with surgery, radiation, and/or chemotherapy. Chemotherapy, a cornerstone in the development of present day cancer therapy, is one of the most effective and potent strategies to treat malignant tumors. However, the resista…
The accuracies of two theoretical expressions for thermal boundary resistance are assessed by comparing their predictions to independent predictions from molecular dynamics (MD) simulations. In one expression $({R}_{E})$, the phonon distributions are assumed to follow the equilibrium, Bose-Einstein distribution, while…
Dynamic light scattering (DLS) is an analytical tool used routinely for measuring the hydrodynamic size of nanoparticles and colloids in a liquid environment. Gold nanoparticles (GNPs) are extraordinary light scatterers at or near their surface plasmon resonance wavelength. In this study, we demonstrate that DLS can b…
In natural photosynthesis, organisms optimize solar energy conversion through organized assemblies of photofunctional chromophores and catalysts within proteins that provide specifically tailored environments for chemical reactions. As with their natural counterparts, artificial photosynthetic systems for practical so…
We use nanoparticle-polymer composites to demonstrate the anti-icing capability of superhydrophobic surfaces and report direct experimental evidence that such surfaces are able to prevent ice formation upon impact of supercooled water both in laboratory conditions and in natural environments. We find that the anti-ici…
Abstract Over the past several years, a substantial increase in deep water exploration and production has brought new challenges to corrosion and material technology. The production environments in deep wells normally involve high temperature, high pressure, and sweet/sour gas. These severe conditions require corrosio…
Periplasmic binding proteins (PBPs) constitute a protein superfamily that binds a wide variety of ligands. In prokaryotes, PBPs function as receptors for ATP-binding cassette or tripartite ATP-independent transporters and chemotaxis systems. In many instances, PBPs bind their cognate ligands with exquisite specificity…
We have proposed a kind of nonvolatile resistive switching memory based on amorphous LaLuO3, which has already been established as a promising candidate of high-k gate dielectric employed in transistors. Well-developed unipolar switching behaviors in amorphous LaLuO3 make it suited for not only logic but memory applic…
Abstract The influence of molecular architecture on light‐induced SRG formation was investigated. Polymers with different degree of branching were synthesized by ATRP and functionalized with azobenzene chromophores. The polymers differ only in their architecture – linear, 4‐, 6‐, or 12‐arms stars. The photo‐induced di…
Abstract With standard differential scanning calorimetry (DSC), it is possible to derive calorimetric data for equilibrium or metastable samples. The introduction of temperature-modulated DSC (TMDSC) permits in its quasi-isothermal (non-scanning) mode (TMDC), long-time apparent heat capacity measurements of high preci…
The formalism for, and the values of, aspherical electron scattering factors using relativistic wavefunctions are presented. The parameterizations of electron form factors valid for a full range of scattering vectors from 0.0 to 6.0 Å −1 were obtained for atoms with atomic number 1 (H) to 54 (Xe) by fitting a linear c…
We use magnetic Barkhausen noise to assess the microstructure, hardness, and residual stresses in hardened surface layers. We performed measurements on induction surface-hardened specimens, the thickness of hardened layers being different in each case. A change in the microstructure of the hardened surface layer produ…
Abstract The conformational characteristics of polyelectrolytes end‐grafted on two apposing walls are studied. The monovalent and multivalent counterions are explicitly treated. It is found that the polyelectrolyte brushes undergo a collapse transition in the presence of multivalent counterions at large wall separatio…
Die spontane Bildung selbstorganisierter hochgeordneter zwei- und dreidimensionaler Anordnungen aufrechter Nanostäbe auf großen Übergitterdomänen (siehe Bild) wird beschrieben. Die hexagonal dichte Packung der Nanostäbe senkrecht zum Substrat erinnert an flüssigkristalline Smektisch-B-Phasen. Optische Untersuchungen b…