Materials Literature
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In this study we used nitroxide-mediated radical polymerization to synthesize poly(styrene-b-4-vinylbenzyl azide) (PS-b-PVBN3) and then used click chemistry to react it with propargyl-thymine (PT) to obtain a series of thymine (T)-containing block copolymers, poly(styrene-b-4-vinylbenzyl triazolylmethyl methylthymine)…
The effects of the structures on the energy gaps in luminescent carbon nanoparticles (CNPs) were investigated. On the one hand, we fabricated CNPs with the different structures and a uniform size and then analyzed their photoluminescence (PL) behaviors. On the other hand, we calculated the dependence of the structures…
Mesoporous dielectric multilayer films exhibit an optical response (Bragg resonance) that is highly sensitive to the chemical environment. Using sol–gel preparation and spin-coating deposition method, titania/silica mesoporous layers were alternatively deposited and consolidated to form a Bragg stack on a glass substr…
The synthesis and characterization of low-generation pyridylimine Rh(I) metallodendrimers is described. These metallodendrimers were obtained via a Schiff base condensation of tris-2-(aminoethyl)amine with 2-pyridinecarboxaldehyde to afford the tris-2-(2-pyridylimine ethyl) amine ligand (1). Subsequent complexation re…
This work designs a new strategy for the direct synthesis of different zinc oxide (ZnO) nanostructures at low temperatures. Micelles of dodecylamine (DDA) assembled in an ethanol-water system have been explored as a template to direct the growth of the ZnO nanostructures. The key species for the formation of the ZnO n…
A method for durability testing of solid oxide cell electrodes in current-switching operation is presented. The aim is to obtain correlated time-dependent electrochemical and microstructural information by simultaneously testing multiple identical cells connected in series. By periodically removing cells from the circ…
In the review we demonstrate correlation of the polarization vector structure with domain walls conductivity in ferroelectrics, multiferroics, ferroelastics, and related materials. In particular, free carriers type and accumulation degree strongly depend on the wall incline and rotation angles with respect to the spon…
The flexoelectric effect of a rod-like nematic liquid crystal (pentyl-cyanobiphenyl, 5CB) doped with bent-core liquid crystals with a high kink angle ∼130° was studied. Although the previous theoretical models predicted that such highly-kinked molecules with a longitudinal dipole moment would have no significant influ…
Polymer nanostructures and nanopatterns are being profusely used for developing next-generation organic devices with analytical and biological functions and photonic applications. Laser based strategies constitute an advantageous approach for the assembly and control of this type of soft matter nanostructures as they…
Intense red-emitting phosphors Sr 3-2 x Eu x Na x B 2 SiO 8 were synthesized via high-temperature solid-state reactions. The crystal structure, luminescent properties, and quantum efficiencies of the as-prepared phosphors, as well as their luminescent thermal quenching capabilities and CIE coordinates were investigate…
We have been performing research on a Totalized Hydrogen Energy Utilization System (THEUS) which is composed of a Unitized Reversible Fuel Cell (URFC) and metal hydride tanks. THEUS is very similar to the regenerative fuel cell system located at the Savannah River National Laboratory (SRNL) but it utilizes the thermal…
Quantum dots are known for their superior optical properties; however, when transferred into aqueous media, their luminescent properties are frequently compromised. When encapsulated in micelles for bioimaging applications, luminescent silicon quantum dots can lose as much as 50% of their luminescence depending on the…
It is widely accepted that the lattice thermal conductivity of a polycrystal mainly depends on its grain sizes, phonon mean free paths, and grain-boundary thermal resistance. However, uncertainties always exist on how much grain misalignment and a wide grain size distribution in a real polycrystal could affect the the…
The wettability of a vertical Si nanowire (SiNW) array surface, prepared by a metal-assisted chemical etching technique, has been systematically investigated. The simple contact printing of siloxane oligomers has converted a SiNW array surface from superhydrophilic to superhydrophobic. In addition to the contact-print…
A thymidine derivative was functionalized to mesoporous silica nanoparticles in order to serve as a pH sensitive gate upon capping with polyadenine. Controlled zero release of rhodamine B mock cargo from the system at neutral pH reveals its potential as a delivery system.
Corrosion behaviour of AZ and ZA magnesium alloys in untreated, aerated, and deaerated chloride media was investigated. The influence of impurity, alloying element, and oxygen on corrosion potential, rate, and pitting was examined in alkaline media saturated with Mg(OH) 2 at pH 9 and 25°C. After 8 h immersion, slightl…
The effect of heat treatment on the microstructure and mechanical properties of Ti-alloyed hypereutectic High Chromium Cast Iron (HCCI) containing Fe–17 mass%Cr–4 mass%C–1.5 mass%Ti was investigated. The size distribution and the volume fraction of carbides (M7C3 and TiC) as well as the matrix structure (martensite) w…
The ability to decorate microfluidic channel walls with additional micro/nanostructures becomes important as a means to modify the flow behavior, such as mixing and pressure drop, as well as to enhance the reactivity of bio-reactions to the surface in lab-on-a-chip applications. Despite the ability of mass production…
Oriented growth of Bi2Fe4O9 crystals were synthesized by a facile hydrothermal route in the presence of different organic additives. X-ray diffraction was used to characterize the derived powders, indicating that single-phase Bi2Fe4O9 with growth orientation along the (001) and (221) planes were obtained respectively.…
Electroconductive hydrogels has been extensively studied in drug delivery systems because they combine the properties of hydogels with the conducting polymers in only one material. In this work, pyrrole was polymerized electrochemically into poly(acrylic acid) hydrogel. This material kept the swelling properties that…