Materials Literature
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The application of static high pressure provides a means to precisely control and investigate many fundamental and unique properties of nanoparticles. CdSe is a model quantum-dot system, the behavior of which under high pressure has been extensively studied; however, the effect of nonuniform stresses on this system ha…
Ge nanocrystals (NCs) embedded in silicon dioxide (SiO2) matrix are grown by radio-frequency magnetron sputtering and studied in order to understand the origin of ultraviolet (UV) and blue photoluminescence (PL) from the NC-SiO2 system. Ge NCs of diameter 7–8 nm are formed after postdeposition annealing, as confirmed…
The synthesis of ReS 2 onionlike nanoparticles by means of a high-temperature MOCVD process starting from Re 2 (CO) 10 and elemental sulfur is reported. The reaction is carried out in a two-step process where the intermediate product, amorphous ReS 2 nanoparticles, formed through the high-temperature reaction of rheni…
Three different rapid manufacturing methods for the construction of fluoropolymer microfluidic devices were investigated: (1) fluoropolymer/epoxy laminate/fluoropolymer structures, (2) fluoropolymer/fluoropolymer structures and (3) fluoropolymer/epoxy laminate/glass structures. The structures are chemically and physic…
Self-organization of molecules in solution is an important natural and synthetic process, in particular for the preparation of nanomaterials. However, the mechanism of growth for solution-based nanoparticle formation is not always well understood. We present results that clarify these mechanisms in solutions of magnes…
Sweet or savory? Controlled porosity has been introduced in a gelled soybean oil by employing a particulate leaching method with sugar and salt templates. The materials resulting from unmodified natural soybean oil show high porosity and important water-draining properties. These new biodegradable soft materials may b…
Abstract Polybutadienes (PBs) are found to form inclusion complexes with cyclodextrins (CDs) stereoselectively to give crystalline compounds in bulk. These complexes have been isolated and characterized by means of 1 H NMR and 13 C CP/MAS NMR spectroscopy, and X‐ray diffraction. Although α ‐CD did not form inclusion c…
We reported the fabrication of silicon (Si) nanorods and springs on arrays of seeds with different diameters by using glancing angle deposition technique. Single nanorod is possible to grow on individual seeds if the size of the seeds is small enough. On large size seeds, however, multiple Si nanorods are observed in…
We analyze the influence of a thin polymer layer with lateral side groups on the anchoring of a nematic liquid crystal. We show that the effective anisotropic part of the anchoring energy depends on the coupling of the nematic with the polymer side groups, as well as on the coupling of the polymer side groups with the…
Unloading wave profile measurements using the velocity interference system for any reflector technique were performed on LY12 Al over shock stress ranging from ∼20to∼100GPa, from which longitudinal and bulk sound velocities along the quasielastic release path were evaluated. Based on the intrinsic relations under unia…
The low-temperature crystal structures of perdeuterogermane (m.p. 108 K) and perdeuterostannane (m.p. 123 K) are reported. The structures have been characterized from low-temperature (5 K) high-resolution neutron powder diffraction experiments following sample preparation using in situ gas-condensation techniques. GeD…
As a generic model system of an asymmetric binary-fluid mixture, hexadecane dissolved in carbon dioxide is considered, using a coarse-grained bead-spring model for the short polymer, and a simple spherical particle with Lennard-Jones interactions for the carbon dioxide molecules. In previous work, it has been shown th…
We propose a new type of carbon nanotube (CNT) motor composed of a single-wall CNT (SWCNT) and a double-wall CNT (DWCNT), that are in mechanical contact. The rotational motion of our CNT motor is controllable by the translational motion of the SWCNT along the axis of the DWCNT. From molecular dynamics simulations, we…
A numerical investigation of the two-dimensional, oscillatory natural convection during the solidification of a liquid metal contained in a rectangular cavity, having an aspect ratio equal to 4 and submitted to an external uniform magnetic field, is presented. The numerical approach is based on the finite-volume appro…
We investigate the midinfrared generation from difference frequency in self-assembled quantum dots near metal nanoparticles with two-color interband excitations. The generated signal strength is enhanced by several orders of magnitude due to the plasmon-exciton resonance in the nanosuperstructures. The signal enhancem…
Kinase photoactivation: We have demonstrated that a caged analogue of SH2 domain-binding phosphotyrosine peptide can be used as a tool for activating an intracellular phosphatidylinositol 3-kinase (PI3K) by light. This approach should be generally applicable to other protein/lipid kinases of which the catalytic activi…
Impedance spectroscopy is an effective method to investigate physical properties of multicomponent systems so that contributions of individual components can be extracted from different sections of the spectra, which is frequency dependent. Slurries can be considered as 0–3 mixed systems containing a host liquid and d…
We have studied in situ fractured surfaces of single-crystal ${\text{La}}_{0.7}{\text{Sr}}_{0.3}{\text{MnO}}_{3}$ with hard x-ray photoemission (HXPS) at an excitation energy of 7.7 keV. These more bulk-sensitive measurements reveal low-binding-energy satellites in the $\text{Mn}\text{ }2{p}_{3/2}$, $3s$, and $3p$ cor…
The magnetic properties of Fe-Pd magnetic shape memory alloys with different Pd contents are investigated in epitaxial films and by means of density functional calculations. The magnetocrystalline anisotropy energy (MAE) of ordered and disordered Fe-Pd alloys is calculated as a function of $c/a$ ratio and Pd concentra…
In this paper, we report the optical and ultrafast nonlinear optical properties of Yb3+ doped sodium borate and bismuthate glasses. The glasses have been prepared through the melt quench technique. Optical absorption measurements show compositional dependent absorption spectrum of Yb3+, which is due to the higher crys…